If a Digital Object Identifier (DOI) is listed on an electronic source, it is included in the reference. A DOI is a unique alphanumeric string that is used to identify a certain source (typically journal articles). It is often found on the first page of an article or may be included in an e-book record.
[#] First Initial. Surname, "Title of article," Title of Journal, Volume, Number, Page Numbers, Month Year. [Format]. Available: Database Name OR DOI OR internet address. [Accessed: Month Day, Year].
 R. Abell, S. Morgan, and A. Morgan, “Taking high conservation value from forests to freshwaters,” Environmental Management, vol. 56, no. 1, pp. 1 – 10, 2015. [Online]. Available: ProQuest, http://search.proquest.com. [Accessed: Aug. 4, 2014].
 W. A. Henry and N. S. Mehta, "Beyond the melting pot", Time, vol. 135, pp. 28-31. [Online]. Available: http://content.time.com/time/magazine/article/0,9171,969770,00.html. [Accessed: Aug. 15, 2015].
[#] First Initial. Surname, "Title of article," Title of Newspaper, Page Number, Month Day, Year. [Format]. Available: Database Name OR internet address. [Accessed: Month Day, Year].
 K. Severson and A. Martin, "It's organic, but does that mean it's safer?" The New York Times, p. B6, Mar. 3, 2009. [Online]. Available: http://www.nytimes.com/2009/03/04/dining/04cert.html?_r=0. [Accessed: May 1, 2016]