Gaya APA

Leon, S. (2005). Clinical Gynecologic Endocrinology and Infertility (7th.ed.). America: Lippicott Williams and Wilkins.

Gaya MLA

Leon, Speroff. "Clinical Gynecologic Endocrinology and Infertility". 7th.ed. America: Lippicott Williams and Wilkins, 2005. Text.