Social Security Administration. (1978). Social security handbook: Retirement insurance, survivors insurance, disability insurance, health insurance, supplemental security income, black lung benefits (6. ed.). Dept. of Health, Education, and Welfare, Social Security Administration.
Chicago-Zitierstil (17. Ausg.)Social Security Administration. Social Security Handbook: Retirement Insurance, Survivors Insurance, Disability Insurance, Health Insurance, Supplemental Security Income, Black Lung Benefits. 6. ed. [Washington, D.C.]: Dept. of Health, Education, and Welfare, Social Security Administration, 1978.
MLA-Zitierstil (9. Ausg.)Social Security Administration. Social Security Handbook: Retirement Insurance, Survivors Insurance, Disability Insurance, Health Insurance, Supplemental Security Income, Black Lung Benefits. 6. ed. Dept. of Health, Education, and Welfare, Social Security Administration, 1978.