Johnson, K. (2011). The confidence solution: Reinvent your life, explode your business, skyrocket your income (Teacher master mind editions.). Jeremy P. Tarcher.
Παραπομπή σε μορφή Chicago (17η εκδ.)Johnson, Keith. The Confidence Solution: Reinvent Your Life, Explode Your Business, Skyrocket Your Income. Teacher master mind editions. New York: Jeremy P. Tarcher, 2011.
Παραπομπή σε μορφή MLA (8th εκδ.)Johnson, Keith. The Confidence Solution: Reinvent Your Life, Explode Your Business, Skyrocket Your Income. Teacher master mind editions. Jeremy P. Tarcher, 2011.
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