Cita APA (7a ed.)

Singh, S., Wulf, D., Hussain, R., Bankole, A., & Sedgh, G. (2012). Abortion Worldwide: A decade of uneven progress. GUTTMACHER INSTITUTE.

Cita Chicago Style (17a ed.)

Singh, Susheela, Deirdre Wulf, Rubina Hussain, Akinrinola Bankole, y Gilda Sedgh. Abortion Worldwide: A Decade of Uneven Progress. GUTTMACHER INSTITUTE, 2012.

Cita MLA (8a ed.)

Singh, Susheela, et al. Abortion Worldwide: A Decade of Uneven Progress. GUTTMACHER INSTITUTE, 2012.