Cita APA (7th ed.)

Speroff, L., & Darney, P. D. (2011). A clinical guide for contraception (Fifth edition.). Wolters Kluwer Health/Lippincott Williams & Wilkins.

Cita Chicago (17th ed.)

Speroff, Leon, i Philip D. Darney. A Clinical Guide for Contraception. Fifth edition. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins, 2011.

Cita MLA (9th ed.)

Speroff, Leon, i Philip D. Darney. A Clinical Guide for Contraception. Fifth edition. Wolters Kluwer Health/Lippincott Williams & Wilkins, 2011.