The "Date of Access" should be used when there is not a publication date, when the website no longer exists or when it is known that the website has been changed.
Works Cited
Author. “Article Title.” Newspaper/Magazine Title, vol. #, no. #,
Publication Date, URL. Date of Access (if applicable).
Works Cited
Parker, Laura. “How 'Crisis Mapping' Is Shaping Disaster Relief in
Nepal.” National Geographic, 1 May 2015,
news.nationalgeographic.com/2015/05/150501-nepal-crisis-
mapping-disaster-relief-earthquake/.
“The Scientists Speak.” The New York Times, 20 Nov. 2007,
www.nytimes.com/2007/11/20/opinion/20tue1.html.
According to Parker, "A direct quote from the article."
"A direct quote from this article; however, only include the page
number if the electronic article has the publication page numbers"
(Parker).
or
Typically, a paraphrased sentence will have the author's name
and the page number, if available, at the end. When paraphrasing from
an article without a named author, use the title of the article for the
citation and the page number if available ("The Scientists Speak").