ENGEL HERBERT. (1990). HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE (2.). JAICO PUBLISHING HOUSE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रENGEL HERBERT. HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE. 2. BOMBAY: JAICO PUBLISHING HOUSE, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रENGEL HERBERT. HOW TO DELEGATE A GUIDE TO GETTING THINGS DONE. 2. JAICO PUBLISHING HOUSE, 1990.
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