Drucker Peter F. (2004). Effective Executive: The Definitive Guide to Getting the Right Things Done. HBR ,Harper Business.
Chicagoスタイル(17版)引用形式Drucker Peter F. Effective Executive: The Definitive Guide to Getting the Right Things Done. UK: HBR ,Harper Business, 2004.
MLA(9版)引用形式Drucker Peter F. Effective Executive: The Definitive Guide to Getting the Right Things Done. HBR ,Harper Business, 2004.
警告: この引用は必ずしも正確ではありません.