Cita APA (7th ed.)

Singh, S., & Wulf, D. H. (2009). Abortion worldwide: A decade of uneven progress.

Cita Chicago (17th ed.)

Singh, Susheela, i Deirdre Hussain Wulf. Abortion Worldwide: A Decade of Uneven Progress. 2009.

Cita MLA (8th ed.)

Singh, Susheela, i Deirdre Hussain Wulf. Abortion Worldwide: A Decade of Uneven Progress. 2009.