Klein, M. W., & Maxson, C. L. (2006). Street gang patterns and policies. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Klein, Malcolm W., agus Cheryl Lee Maxson. Street Gang Patterns and Policies. Oxford ; New York: Oxford University Press, 2006.
Lua MLA (9ú heag.)Klein, Malcolm W., agus Cheryl Lee Maxson. Street Gang Patterns and Policies. Oxford University Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.