APA aipamena

Schreiber, C. A., Whittington, S., Cen, L., & Maslankowski, L. (2010). Risk factors for unintended pregnancies in the U.S. cohort of a microbicide trial. Contraception.

Chicago Style aipamena

Schreiber, Courtney A., Sara Whittington, Liyi Cen, and Lisa Maslankowski. "Risk Factors for Unintended Pregnancies in the U.S. Cohort of a Microbicide Trial." Contraception 2010.

MLA aipamena

Schreiber, Courtney A., Sara Whittington, Liyi Cen, and Lisa Maslankowski. "Risk Factors for Unintended Pregnancies in the U.S. Cohort of a Microbicide Trial." Contraception 2010.