APA reference list example: Web source with author. All authors are listed by last name and first initials. Hoppin, A. G., & Taveras, E. M. The date is in year, month day order: 2004, June 25 in parentheses. The article title is Assessment and management of childhood and adolescent obesity. The newsletter title is Clinical Update. It is italicized. The words “Retrieved from” are followed by the URL http://www.medscape.com/viewarticle/481633. There is no period at the end.