APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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