In order to develop your own position on an issue it is often helpful to see how others have formatted their arguments. The following three resources provide pro/con arguments on a variety of topics, as well as additional resources for you to develop your own position on an issue.
Try the following search strings in Academic Search Premier. Depending on your topic, you may also try searching CINAHL with Full Text (Health-related topics), Education Full Text, Education Research Complete, ERIC, PsycINFO & PsycARTICLES, Social Work Abstracts, Social Work Reference Center, and SocIndex for finding articles with a particular position. All of these are available through the EBSCO Articles link from the library's main page.
Advocates of positions related to controversial issues often form associations. Their websites are excellent places to find arguments in support of a particular position.
Search using an advanced Google search limiting your search to .org sites
Parts of a Rogerian Argument