Dyfyniad APA

Ball, R. M. (1978). Social security today and tomarrow. Columbia University Press.

Dyfyniad Arddull Chicago

Ball, Robert M. Social Security Today and Tomarrow. New York: Columbia University Press, 1978.

Dyfyniad MLA

Ball, Robert M. Social Security Today and Tomarrow. Columbia University Press, 1978.

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