Note that a centered main heading is required whenever a new page is required in the paper. Begin with paragraph indention. Type second and succeeding lines flush with the left margin. Generally, numbers one through nine in sentences should be spelled out. Numbers 10 and greater should be typed as numerals, except where they begin a sentence.
Percent Use the symbol for percent only when it is preceded by a numeral.
Use the word percentage when a number is not given. Nonsexist and Ethnically Unbiased Language Guidelines have been developed by the APA to avoid sexism and ethnic bias in research writing. Generally, one should choose nouns, pronouns, and adjectives to eliminate the possibility of ambiguity in sex identity. Moreover, scientific writing should be free of implied or irrelevant evaluation of the sexes. Students are usually the best judges of the quality of the courses they have taken.