The citation style for the Personal Project is MLA.
The biggest thing you can do to avoid plagiarism is to keep track of your sources in an organized way. As you do your research and take notes, make sure you also note where you are getting that information from. You may not need to include it in your bibliography in the end but at least you won't be scrambling to remember where the original information came from if you do use it. Remember: it is much better to over-cite then under-cite.
ASW has a subscription to NoodleTools, the citation management tool. For your PP, create a new project, select the MLA Citation style and the Junior level. You can easily change to another level at anytime if you need to. More information and how-to's for students can be found HERE. **To set up an account you'll need to register first with a special username and password which can be found HERE.
Another great resources for citations is OWL - Purdue University's Online Writing Lab