Cassidy, C. M. K. R. (2011). Principal of management (12th.). South western cengage learning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCassidy, Carlene M.& Kreitner Robert. Principal of Management. 12th. Australia: South western cengage learning, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCassidy, Carlene M.& Kreitner Robert. Principal of Management. 12th. South western cengage learning, 2011.
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