APA

Taffel S., National Center for Health Statistics U.S, . (1994). Cesarean delivery in the United States, 1990. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics.

Chicago

Taffel Selma, National Center for Health Statistics U.S, . 1994. Cesarean delivery in the United States, 1990. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics.

Harvard

Taffel S., National Center for Health Statistics U.S, . (1994). Cesarean delivery in the United States, 1990. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics.

MLA

Taffel Selma, National Center for Health Statistics U.S, . Cesarean delivery in the United States, 1990. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics. 1994.