Use as 2 out the 4 sources:
Akers, R. L., & Sellers, C. S. (2013). Criminological theories: Introduction,
evaluation, and application (6th ed.). New York, NY: Oxford
Ireland, C., & Rush, G. (2011). The dictionary of criminal justice: With
summaries of Supreme Court cases affecting criminal justice (7th ed.).
New York, NY: McGraw-Hill.