Dyfyniad APA

ebrary, Inc, & Álvarez, J. T. (2011). Social security: Background, issues and proposals. Nova Science Publishers.

Dyfyniad Arddull Chicago

ebrary, Inc, and Jacob T. Álvarez. Social Security: Background, Issues and Proposals. New York: Nova Science Publishers, 2011.

Dyfyniad MLA

ebrary, Inc, and Jacob T. Álvarez. Social Security: Background, Issues and Proposals. Nova Science Publishers, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.