Cita APA (7a ed.)

Spergel, I. (1993). Youth Gangs: Problem and Response. National Youth Gang Information Center.

Cita Chicago Style (17a ed.)

Spergel, Irving. Youth Gangs: Problem and Response. National Youth Gang Information Center, 1993.

Cita MLA (9a ed.)

Spergel, Irving. Youth Gangs: Problem and Response. National Youth Gang Information Center, 1993.