Cita APA (7a ed.)

Freeman, E. W., & Rickels, K. (1993). Early childbearing: Perspectives of Black adolescents on pregnancy, abortion, and contraception. Sage.

Cita Chicago Style (17a ed.)

Freeman, Ellen W., y Karl Rickels. Early Childbearing: Perspectives of Black Adolescents on Pregnancy, Abortion, and Contraception. Newbury Park [etc.]: Sage, 1993.

Cita MLA (9a ed.)

Freeman, Ellen W., y Karl Rickels. Early Childbearing: Perspectives of Black Adolescents on Pregnancy, Abortion, and Contraception. Sage, 1993.