APA

United States, . (19). Social security handbook on retirement insurance, survivors insurance, disability insurance, health insurance for the aged. Washington: U.S. Dept. of Health, Education, and Welfare, Social Security Administration.

Chicago

United States, . 19. Social security handbook on retirement insurance, survivors insurance, disability insurance, health insurance for the aged. Washington: U.S. Dept. of Health, Education, and Welfare, Social Security Administration.

Harvard

United States, . (19). Social security handbook on retirement insurance, survivors insurance, disability insurance, health insurance for the aged. Washington: U.S. Dept. of Health, Education, and Welfare, Social Security Administration.

MLA

United States, . Social security handbook on retirement insurance, survivors insurance, disability insurance, health insurance for the aged. Washington: U.S. Dept. of Health, Education, and Welfare, Social Security Administration. 19.