The reason for documentation is to credit the author and publisher for their original work and to enable your readers to consult the same sources you did.
Documentation also helps avoid plagiarism.
Refer to the Radford University Student Handbook for more information on the issue of plagiarism. The examples in this handout are for the online and electronic products available through the McConnell Library that are most-used by students, as well as for World Wide Web sources. Within a Parent Site Reference Citations in Text Electronic Full-Text Sources Follow standard MLA citation style to present the author, article title, name of periodical and date of publication. Most periodicals on the Web use issue dates, volume numbers and issue numbers. It is sometimes difficult to determine these, but it is always wise to look for them.