APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.