APA (7th ed.) Citation

Spergel, I., Laseter, R. L., Alexander, A., & Ehrensaft, K. (1992). Youth Employment Model. National Youth Gang Information Center.

Chicago Style (17th ed.) Citation

Spergel, Irving, Robert L. Laseter, Alba Alexander, and Kenneth Ehrensaft. Youth Employment Model. National Youth Gang Information Center, 1992.

MLA (9th ed.) Citation

Spergel, Irving, et al. Youth Employment Model. National Youth Gang Information Center, 1992.