United States. Office of Aging & United States. Department of Health, Education and Welfare. Library. (1963). Aging in the modern world: An annotated bibliography. U.S. Department of Health, Education and Welfare, Welfare Administration, Office of Aging.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States. Office of Aging και Education and Welfare. Library United States. Department of Health. Aging in the Modern World: An Annotated Bibliography. Washington: U.S. Department of Health, Education and Welfare, Welfare Administration, Office of Aging, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)United States. Office of Aging και Education and Welfare. Library United States. Department of Health. Aging in the Modern World: An Annotated Bibliography. U.S. Department of Health, Education and Welfare, Welfare Administration, Office of Aging, 1963.