Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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