Drucker, P. F. (1967). The effective executive. Heinemann.
Chicagoスタイル(17版)引用形式Drucker, Peter F. The Effective Executive. London: Heinemann, 1967.
MLA(8版)引用形式Drucker, Peter F. The Effective Executive. Heinemann, 1967.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式