Colberg, M. R. (1978). The social security retirement test: Right or wrong? American Enterprise Institute for Public Policy Research.
Chicago-Zitierstil (17. Ausg.)Colberg, Marshall R. The Social Security Retirement Test: Right or Wrong? Washington, DC: American Enterprise Institute for Public Policy Research, 1978.
MLA-Zitierstil (9. Ausg.)Colberg, Marshall R. The Social Security Retirement Test: Right or Wrong? American Enterprise Institute for Public Policy Research, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.