Tulgan, B. (2014). The 27 challenges managers face: Step-by-step solutions to (nearly) all of your management problems. Jossey-Bass.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTulgan, Bruce. The 27 Challenges Managers Face: Step-by-step Solutions to (nearly) All of Your Management Problems. San Francisco, California: Jossey-Bass, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTulgan, Bruce. The 27 Challenges Managers Face: Step-by-step Solutions to (nearly) All of Your Management Problems. Jossey-Bass, 2014.
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