Drucker Peter F. (2004). Effective Executive: The Definitive Guide to Getting the Right Things Done. HBR ,Harper Business.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDrucker Peter F. Effective Executive: The Definitive Guide to Getting the Right Things Done. UK: HBR ,Harper Business, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDrucker Peter F. Effective Executive: The Definitive Guide to Getting the Right Things Done. HBR ,Harper Business, 2004.
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