Citation Styles . Check it out. This is a really current guide and may be the best around online. This site also has links to various other sources of information. The APA Publication Manual Crib Sheet is no longer available and it's worth going to this site to learn why it isn't.
Additional links are available at the cite for learning how to cite materials.
This section answers various questions, which change periodically. While you're at the APA's site see their listing of media releases. Many of these deal with crime, deviation, crime prevention and related topics. A Legal Citation Guide . The Elements of Style Online .