APA

National Center for Health Statistics U.S, . (1996). Prenatal care in the United States, 1980-94. 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

National Center for Health Statistics U.S, . 1996. Prenatal care in the United States, 1980-94. 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

National Center for Health Statistics U.S, . (1996). Prenatal care in the United States, 1980-94. 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

National Center for Health Statistics U.S, . Prenatal care in the United States, 1980-94. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Center for Health Statistics. 1996.