Cita APA (7a ed.)

Spergel, I. A., & Curry, G. D. (1993). The National Youth Gang Survey: A research and development process. Research Press.

Cita Chicago Style (17a ed.)

Spergel, Irving A., y G. David Curry. The National Youth Gang Survey: A Research and Development Process. Research Press, 1993.

Cita MLA (9a ed.)

Spergel, Irving A., y G. David Curry. The National Youth Gang Survey: A Research and Development Process. Research Press, 1993.