APA (7th ed.) Citation

Society of Perinatal Obstetricians. (1991). 11th annual meeting of the Society of Perinatal Obstetricians: January 28 - February 2, 1991, San Francisco, California. Mosby-Year Book, Inc.

Chicago Style (17th ed.) Citation

Society of Perinatal Obstetricians. 11th Annual Meeting of the Society of Perinatal Obstetricians: January 28 - February 2, 1991, San Francisco, California. St. Louis, Mo: Mosby-Year Book, Inc, 1991.

MLA (9th ed.) Citation

Society of Perinatal Obstetricians. 11th Annual Meeting of the Society of Perinatal Obstetricians: January 28 - February 2, 1991, San Francisco, California. Mosby-Year Book, Inc, 1991.