APA (7th ed.) Citation

Spergel, I. (1991). Youth Gangs: Problem and Response. National Youth Gang Information Center.

Chicago Style (17th ed.) Citation

Spergel, Irving. Youth Gangs: Problem and Response. National Youth Gang Information Center, 1991.

MLA (9th ed.) Citation

Spergel, Irving. Youth Gangs: Problem and Response. National Youth Gang Information Center, 1991.

Warning: These citations may not always be 100% accurate.