Cita APA (7a ed.)

Watkins, D., & Ashby, R. (2007). Gang investigations: A street cop's guide. Jones and Bartlett Publ.

Cita Chicago Style (17a ed.)

Watkins, Derrick, y Richard Ashby. Gang Investigations: A Street Cop's Guide. Sudbury, Mass. [u.a.]: Jones and Bartlett Publ, 2007.

Cita MLA (8a ed.)

Watkins, Derrick, y Richard Ashby. Gang Investigations: A Street Cop's Guide. Jones and Bartlett Publ, 2007.