Problem: Article: For an APA reference entry, list the poet's last name first, followed by a comma. Then type the first initial of the poet's first name. Even if the poem is included in an edited anthology, use the poet's name rather than the editor's name. Example: Pope, A. After the poet's name, include the year the poem was published. Use the year the poem you read was published, not the year the poem was originally published. Place a period after the closing parentheses mark. Example: Pope, A. (1963). If there is no date of publication (such as with poems published online), use the abbreviation "n.d." For example: Herrick, R. (n.d.). If the poem appears in a book of collected poems by the same poet, your full reference entry cites the work as a whole, rather than the individual poem. Write the title in sentence-case, capitalizing only the first word and any proper nouns in the title. Include the first initial and last name of any editor in parentheses. Place a period at the end. Example: Pope, A. (1963). The poems of Alexander Pope (J. Butt, Ed.). If a poem appears in an anthology of poems by different poets, type the title of the poem, using sentence-case. Place a period at the end of the poem's title. Then type the word "In," followed by the first initial and last name of the editor of the anthology. Place a comma, then provide the title of the anthology in italics, followed by the pages where the poem appears in parentheses. Place a period after the closing parentheses mark. Example: Cleveland, J. (1972). To the state of love, or the senses festival. In H. Gardner (Ed.), The metaphysical poets (pp. 218-220). For poems online, the title of the poem itself follows immediately after the date of publication. Type the title in sentence-case, capitalizing only the first word and any proper nouns. Place a period at the end of the title. Example: Herrick, R. (n.d.) To daffodils. For print sources, include the location and name of the publisher, separated by a colon. Place a period at the end. For poems published online, type "Retrieved from" followed by the direct URL for the poem. Do not place a poem at the end of the URL. Collection example: Pope, A. (1963). The poems of Alexander Pope (J. Butt, Ed.). London: Methuen. Anthology example: Cleveland, J. (1972) To the state of love, or the senses festival. In H. Gardner (Ed.), The metaphysical poets (pp. 218-220). Harmonsworth: Penguin. Online example: Herrick, R. (n.d.) To daffodils. Retrieved from http://quotations.about.com/cs/poemlyrics/a/To_Daffodils.htm APA style uses author-date parenthetical citations in-text. In most cases, the citation follows immediately after any title or quotation from the poem. There is no need to include the poet's name in the citation if it is included in your text. Example: In Ode for Music, on St. Cecilia's Day (Pope, 1963), the poet writes a holiday poem that could be set to music. If there was no publication date, use the abbreviation "n.d." as you did in the reference list entry. For example: To daffodils (Herrick, n.d.) shows the poet's treatment of life's fleetingness.
Summary: List the poet's name first in your full reference entry. Provide the year of publication in parentheses. Italicize the title of a single-author collection. Type the title of the poem if it appears in an anthology. Type the title of the poem in italics if you found it online. Include publication information for the source. Use the poet's name and date of publication for parenthetical citations in-text.

Problem: Article: Chemists often determine the relative proportions of isotopes in a given sample by using a special tool called a mass spectrometer. However, at student-level chemistry, this information is often provided for you on school tests, etc., in the form of established values from scientific literature. For our purposes, let's say we're working with the isotopes carbon-12 and carbon-13. Within a given element, different isotopes appear in different proportions. These proportions are almost always expressed as percentages. Some isotopes will be very common, while others will be very rare - at times, so rare that they can barely be detected. This information can be determined through mass spectrometry or from a reference book. Let's say that the abundance of carbon-12 is 99% and the abundance of carbon-13 is 1%. Other carbon isotopes do exist, but they exist in quantities so small that, for this example problem, they can be ignored. Multiply the atomic mass of each isotope by its percent abundance (written as a decimal). To convert a percentage to a decimal, simply divide it by 100. The converted percentages should always add up to 1. Our sample contains carbon-12 and carbon-13. If carbon-12 makes up 99% of the sample and carbon-13 makes up 1% of the sample, multiply 12 (the atomic mass of carbon-12) by 0.99 and 13 (the atomic mass of carbon-13) by 0.01. A reference book will give percent proportions based on all the known amounts of an element's isotopes. Most chemistry textbooks include this information in a table at the end of the book. A mass spectrometer can also yield the proportions for the sample being tested. Sum the products of the multiplications you performed in the previous step. The result of this addition is the relative atomic mass of your element - the average value of the atomic masses of your element's isotopes. When discussing an element in general, and not specific isotopes of that element, this value is used. In our example, 12 x 0.99 = 11.88 for carbon-12, while 13 x 0.01 = 0.13 for carbon-13. The relative atomic mass of our example is 11.88 + 0.13 = 12.01.
Summary: Determine which isotopes are in the sample. Determine the relative abundance of each isotope in the sample. Multiply the atomic mass of each isotope by its proportion in the sample. Add the results.

Problem: Article: Set it to the highest heat setting. If it has a steam setting, turn this off. Dry heat is best for removing the melted plastic or wax. An alternative for the brown paper bag is wax paper. Be careful not to use thin paper, as it can overheat the plastic or wax and cause a worse mess. Avoid paper with any writing on it, because the heat can cause the ink to transfer onto the fabric or carpet. Don't push down too hard or stay on one section too long, because you do not want the substance to melt farther into the carpet or fabric. The goal is to get the plastic or wax to stick to the bag. This should be done while the paper is still warm from the iron. The plastic or wax should stick to the paper, leaving the surface clean. If there are still bits stuck to the carpet afterward, try gently scrubbing the area with a carpet cleaner, fabric cleaner, or rubbing alcohol. The remaining pieces may budge with a little bit of friction. If the plastic or wax still doesn't come off, try freezing it with an ice pack and breaking it apart once it's frozen. Vacuum the pieces when you're finished.
Summary:
Grab your iron and plug it into an outlet near the stain. Cover the stain with a paper bag. Gently iron over the paper. Gently peel the paper bag off the fabric or carpet. Repeat as necessary.