Gaya APA

Croxatto, H. et al (2005). New mechanisms for Tissue-Selective Estrogen-Free Contraception . New York: Springer Publishing Company, Inc..

Gaya MLA

Croxatto, H.B.. et al. "New mechanisms for Tissue-Selective Estrogen-Free Contraception". New York: Springer Publishing Company, Inc., 2005. Electronic Resource.