Singh, S., Wulf, D., Hussain, R., Bankole, A., & Sedgh, G. (2012). Abortion Worldwide: A decade of uneven progress. GUTTMACHER INSTITUTE.
芝加哥风格引文Singh, Susheela, Deirdre Wulf, Rubina Hussain, Akinrinola Bankole, 与 Gilda Sedgh. Abortion Worldwide: A Decade of Uneven Progress. GUTTMACHER INSTITUTE, 2012.
MLA引文Singh, Susheela, et al. Abortion Worldwide: A Decade of Uneven Progress. GUTTMACHER INSTITUTE, 2012.
警告：这些引文格式不一定是100％准确.