Wickman, G. (2011). Traction: Get a grip on your business (Expanded edition.). BenBella Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWickman, Gino. Traction: Get a Grip on Your Business. Expanded edition. Dallas, TX: BenBella Books, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWickman, Gino. Traction: Get a Grip on Your Business. Expanded edition. BenBella Books, 2011.
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