Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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