APA aipamena

Lopez, L. M., Grimes, D. A., Gallo, M. F., Stockton, L. L., & Schulz, K. F. (2013). Skin patch and vaginal ring versus combined oral contraceptives for contraception. Cochrane Database Syst Rev.

Chicago Style aipamena

Lopez, Laureen M., David A. Grimes, Maria F. Gallo, Laurie L. Stockton, and Kenneth F. Schulz. "Skin Patch and Vaginal Ring Versus Combined Oral Contraceptives for Contraception." Cochrane Database Syst Rev 2013.

MLA aipamena

Lopez, Laureen M., et al. "Skin Patch and Vaginal Ring Versus Combined Oral Contraceptives for Contraception." Cochrane Database Syst Rev 2013.