Websites do not include subscription databases
"A general rule may be applied to the citing of websites: If the website contains data or evidence essential to a point being addressed in the manuscript, it should be formally cited with the URL and date of access." (ASA Style Guide pg. 84)
Author's Last Name, First Name Middle Initial or Corporation sponsor. Year of update (use N.d. if no date is found). "Title of Content." Name of webpage. Retrieved date (complete URL).
Examples:
Harrington, Brooke. 2010. "Economic Sociology." American Sociological Association. Contexts Blogs. Retrieved July 12, 2010 (http://contexts.org/economic sociology/).
United States Department of Education. N.d. "Fast Facts." National Center for Education Statistics. Retrieved December 15, 2015 (https://nces.ed.gov/fastfacts/).
Feidt, Anne. 2009. "Tracking Polar Bears: An Environmental Barometer." National Public Radio, 11 May 2009. Retrieved January 6, 2016 (http://www.npr.org/templates/story/story.php?storyId=103853438).
Schutz, Aaron. 2009. "Poverty and Brain Development, or, I worry: If Poor People are Stupid, Why Bother?" Education Policy Blog. Retrieved September 1, 2016 (http://educationpolicyblog.blogspot.com/2009/05/poverty-and-brain-development-or-i.html).