Cita APA (7a ed.)

Friedman, A. S. (1989). Family therapy versus parent groups: Effects on adolescent drug abusers. The American journal of family therapy, 17(4), 335-347.

Cita Chicago Style (17a ed.)

Friedman, A. S. "Family Therapy Versus Parent Groups: Effects on Adolescent Drug Abusers." The American Journal of Family Therapy 17, no. 4 (1989): 335-347.

Cita MLA (9a ed.)

Friedman, A. S. "Family Therapy Versus Parent Groups: Effects on Adolescent Drug Abusers." The American Journal of Family Therapy, vol. 17, no. 4, 1989, pp. 335-347.