APA

Zappolo A., National Center for Health Statistics (U.S.) & National Nursing Home Survey (U.S.). (1977). Characteristics, social contacts, and activities of nursing home residents: United States : 1973-1974 National Nursing Home survey. Rockville, Md: U.S. Department of Health, Education and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

Chicago

Zappolo Aurora, National Center for Health Statistics (U.S.) and National Nursing Home Survey (U.S.). 1977. Characteristics, social contacts, and activities of nursing home residents: United States : 1973-1974 National Nursing Home survey. Rockville, Md: U.S. Department of Health, Education and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

Harvard

Zappolo A., National Center for Health Statistics (U.S.) and National Nursing Home Survey (U.S.). (1977). Characteristics, social contacts, and activities of nursing home residents: United States : 1973-1974 National Nursing Home survey. Rockville, Md: U.S. Department of Health, Education and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics.

MLA

Zappolo Aurora, National Center for Health Statistics (U.S.) and National Nursing Home Survey (U.S.). Characteristics, social contacts, and activities of nursing home residents: United States : 1973-1974 National Nursing Home survey. Rockville, Md: U.S. Department of Health, Education and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics. 1977.