APA reference list example: Article in an online newsletter. The article title is In the face of extinction. The date is listed by year and month in parentheses, followed by a period: (2008, May). The newsletter title is italicized and followed by a period: NSF Current. The words “Retrieved from” are followed by the URL, with no period at the end: http://www.nsf.gov/news/newsletter/may_08/index.jsp