National Autism Centre Looks At Evidence Based Treatment Choices.

This lengthy document offers a comprehensive look at the numerous treatment options available for young people (under 22 years) with ASD. In fact they separate out Autism, Aspergers, and pdd-nos. It is worth reading the entire study if you have the time, but if you don't have a spare 30 minutes skip to page 87 for a Q & A summary.

http://www.nationalautismcenter.org/pdf/NAC%20Standards%20Report.pdf