This is accomplished through in-text citation and references. In-text citation requires that firstly, the author make use of the past tense when citing previous work (Angeli, 2010). The APA format makes use of the "author-date" method to correctly cite the work of other authors. This method calls for the author's last name and the date of publication to be placed in the text of the work, and a complete reference for that author is placed in a last section entitled references. This approach is necessary for ideas and concepts from other authors. Short quotes require that in addition to the author and date, the page from which the quote is taken should be included in parenthesis. The page number is preceded by p. "If the author is not named in a signal phrase, place the author's last name, the year of publication, and the page number in parentheses after the quotation" (Angeli, 2010, par. 6). Quotations that are longer than 40 words should be placed in a block of text without quotations marks. The quote is started on a new line and indented 5 spaces. The citation is placed at the end of the final punctuation mark of the block quote.

The reference section begins on a new page. Centered at the top of this page is the word "References." The references are listed in alphabetical order using the surname of the authors. The lines after the first line of a reference is given a hanging indent of 0.5" inches (A complete resource, 2010). There is a general format that is employed for referencing work. For books it is "Author, I.N. (Year). Title of book. Location: Publisher" (Cherry, n.d. par. 1), and for a journal article "Author, I.N. (Year). Title of the article. Title of the Journal or Periodical, volume number, page numbers" (Cherry, n.d. par 2). The reference rules for other types of works are...

This pattern is followed for up to seven authors, where a work has more than seven authors an ellipse is given after the name of the sixth author and after the ellipse the final author is named (Angeli 2010). In instances where there are multiple works by the same author or authors the works are listed using the year of publication beginning with the first work.
The APA style is updated in response to changes in information production and publication practices. The most recent updates have been the inclusion of the digital object identifier (DOI) for both print and electronic articles, when it is available. There is a commitment to maintain and encourage high standards of academic rigor and referencing in scientific work.

References

Angeli, E., Wagner, J., Lawrick, E., Moore, K., Anderson, M., Soderland, L., & Brizee, A.

(2010, May 5). General format. Retrieved from http://owl.english.purdue.edu/owl/resource/560/01/

Cherry, K. (n.d.). Book references in APA format book. Retrieved from http://psychology.about.com/od/apastyle/p/bookref.htm

A complete resource. (2010). Retrieved from http://www.apastyle.org/

Khan, H.J. (2010). Sample APA paper for students interested in learning APA Style 6th Edition

Retrieved from http://my.ilstu.edu/~jhkahn/APAsample.pdf

Scott, B. (2009). APA format: How to format a paper in APA style. Retrieved from http://www.articlesbase.com/writing-articles/apa-format-how-to-format-a-paper-in-apa-style-714688.html

Scribe, A. (2010). APA style lite for college papers. Retrieved from http://www.docstyles.com/apacrib.htm#Sec22