Summary of the 1981 Social Security Trustees' Report and Supplementary Historical Information.

MLA

Library of Congress. Summary of the 1981 Social Security Trustees' Report and Supplementary Historical Information. [Place of publication not identified] : [publisher not identified], 1981.

APA

Library of Congress. (1981). Summary of the 1981 Social Security Trustees' Report and Supplementary Historical Information. [Place of publication not identified] : [publisher not identified].

Chicago

Library of Congress. Summary of the 1981 Social Security Trustees' Report and Supplementary Historical Information. [Place of publication not identified] : [publisher not identified], 1981.