Παραπομπή APA

Campbell, C. D. (1979). Financing social security. Washington: American Enterprise Institute for Public Policy Research.

Παραπομπή Chicago Style

Campbell, Colin Dearborn. Financing Social Security. Washington: American Enterprise Institute for Public Policy Research, 1979.

Παραπομπή MLA

Campbell, Colin Dearborn. Financing Social Security. Washington: American Enterprise Institute for Public Policy Research, 1979.

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