ebrary, Inc, & Álvarez, J. T. (2011). Social security: Background, issues and proposals. Nova Science Publishers.
Citace podle Chicago (17th ed.)ebrary, Inc, a Jacob T. Álvarez. Social Security: Background, Issues and Proposals. New York: Nova Science Publishers, 2011.
Citace podle MLA (9th ed.)ebrary, Inc, a Jacob T. Álvarez. Social Security: Background, Issues and Proposals. Nova Science Publishers, 2011.
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