APA (7th ed.) Citation

Gary Cunningham, F., Leveno, K. J., Bloom, S. L., Hauth, J. C., Rouse, D. J., & Spong, C. Y. (2011). Williams: Obstetricia (23 ed.). McGraw Hill.

Chicago Style (17th ed.) Citation

Gary Cunningham, F., Kenneth J. Leveno, Steven L. Bloom, John C. Hauth, Dwight J. Rouse, and Catherine Y. Spong. Williams: Obstetricia. 23 ed. Méxco: McGraw Hill, 2011.

MLA (9th ed.) Citation

Gary Cunningham, F., et al. Williams: Obstetricia. 23 ed. McGraw Hill, 2011.