Cita APA

Hayward, S. C., & Zabin, L. S. Adolescent sexual behaviour and childbearing.

Citación estilo Chicago

Hayward, Sarah C., y Laurie Schwab Zabin. Adolescent Sexual Behaviour and Childbearing. London, Sage Publications.

Cita MLA

Hayward, Sarah C., y Laurie Schwab Zabin. Adolescent Sexual Behaviour and Childbearing.