APA

Collins J. G., National Center for Health Statistics U.S, . (1993). Prevalence of selected chronic conditions: United States. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics.

Chicago

Collins John Gary, National Center for Health Statistics U.S, . 1993. Prevalence of selected chronic conditions: United States. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics.

Harvard

Collins J. G., National Center for Health Statistics U.S, . (1993). Prevalence of selected chronic conditions: United States. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics.

MLA

Collins John Gary, National Center for Health Statistics U.S, . Prevalence of selected chronic conditions: United States. Hyattsville, Md: U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics. 1993.