Drucker, P. (1977). Management cases. Harper College Press.
Chicagoスタイル(17版)引用形式Drucker, Peter. Management Cases. New York: Harper College Press, 1977.
MLA(9版)引用形式Drucker, Peter. Management Cases. Harper College Press, 1977.
警告: この引用は必ずしも正確ではありません.