ASA style is based on the Chicago Manual of Style. Consult the online Chicago Manual if you have a specific question that is not answered in the resources describing ASA.
Be aware: many times the link in the browser bar is a temporary link that is associated with the search you just ran in a database (like Sociological Abstracts) or an online book (like the Blackwell Encyclopedia of Sociology). This means that the link will not resolve to the appropriate source in the future.
Look on the source page for a persistent link. This usually shows up somewhere in the citation information. Lots of library sources will have an option to create a citation in a particular style, or provide you with a generic citation (that you then need to modify to put into ASA style). Or, if a DOI (Digital Object Identifier) is available for the source, use that as the persistent link.
For example:
Use a combination of the guidelines available for chapter in an edited book and website. Provide as much information as you can; okay to omit information that is not available for the electronic version (such as page numbers).
For example:
Press, Andrea. 2007. "Culture, Gender and." In Blackwell Encyclopedia of Sociology, edited by G. Ritzer. Blackwell Publishing. Retrieved March 29, 2018 (http://www.
Harrington, Austin. 2006. "Action." Pp. 1-4 in Encyclopedia of Social Theory, edited by A. Harrington, B.L. Marshall, and H. Muller. New York: Routledge. Retrieved March 29, 2018 (https://www.taylorfrancis.com/books/9780203825471).