Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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