Rogers, B. (2006). Cracking the hard class: Strategies for managing the harder than average class (Second edition.). Paul Chapman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. London: Paul Chapman, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. Paul Chapman, 2006.
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