If a newspaper article has been accessed online, then the citation ends with the URL of the newspaper's website, even if you actually retrieved the article through a database. Use Google to find the URL of the newspaper’s website.
Template:
Author, A. A. (Year, Month Day). Title of article: Subtitle of article. Title of Newspaper. Retrieved from http://...
Example:
Khan, S. (2013, February 28). Beyond tolerance lies true respect. The Globe and Mail. Retrieved from http://www.globeandmail.com
If an article is only available through a database (i.e. when the newspaper is no longer being published and so does not have a website) give the name of the database and the accession number of the article (or whatever unique number the database has assigned to the article), or database URL if there is no accession number.
Example:
Rothenburger, M. (2014, January 11). We thought it would last forever. Kamloops Daily News. Retrieved from LexisNexis database: www.lexisnexis.com/hottopics/lnacademic