MLA (Modern Language Association) style specifies guidelines for formatting manuscripts and using the English language in writing. MLA style also provides writers with a system for referencing their sources through parenthetical citation in their essays and Works Cited pages.
APA (American Psychological Association) is most commonly used to cite sources within the social sciences. This resource, revised according to the 6th edition of the APA manual, offers examples for the general format of APA research papers, in-text citations, endnotes/footnotes, and the reference page.
When using APA format, follow the author-date method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, E.g., (Jones, 1998), and a complete reference should appear in the reference list at the end of the paper.
If you are referring to an idea from another work but NOT directly quoting the material, or making reference to an entire book, article or other work, you only have to make reference to the author and year of publication in your in-text reference.APA style requires authors to use the past tense or present perfect tense when using signal phrases to describe earlier research. E.g., Jones (1998) found or Jones (1998) has found...
The Chicago Manual of Style (CMS) covers a variety of topics from manuscript preparation and publication to grammar, usage, and documentation.
There are two main styles:
The Chicago NB system is most often used in History and is often used in the humanities and provides writers with a system for referencing their sources through footnote or endnote citation in their writing and through bibliography pages.
As with any citation stystem using it correctly protects the writer from accusations of plagiarism. As mentioned earlier in this guide proper citation builds credibility to the paper by demonstrating accountability to source material.If you are asked to use Chicago NB format, be sure to consult The Chicago Manual of Style, 17th edition, and/or A Manual for Writers of Research Papers, Theses, and Dissertations, 8th edition.
Modified from Descriptions for Style Guides (APA) Russell, T., Angeli, E., Wagner, J., Lawrick, E., Moore, K., Anderson, M., Soderland, L., & Brizee, A. (2010, August 1, 2010). General format. Retrieved from http://owl.english.purdue.edu/owl/resource/
OWL at Purdue has a series of guides for Formating and Citing papers using style guides. Below are links to some of those guides.