Ball, R. M. (1978). Social security today and tomarrow. Columbia University Press.
シカゴスタイル引用形Ball, Robert M. Social Security Today and Tomarrow. New York: Columbia University Press, 1978.
MLA引用形式Ball, Robert M. Social Security Today and Tomarrow. Columbia University Press, 1978.
警告: この引用は必ずしも正確ではありません.