Cita APA (7a ed.)

Zelnik, M., Kantner, J. F., & Ford, K. (1981). Sex and pregnancy in adolescence. Sage library of social research.

Cita Chicago Style (17a ed.)

Zelnik, Melvin, John Frederick Kantner, y Kathleen Ford. "Sex and Pregnancy in Adolescence." Sage Library of Social Research 1981.

Cita MLA (9a ed.)

Zelnik, Melvin, et al. "Sex and Pregnancy in Adolescence." Sage Library of Social Research, 1981.