Fritz, R. (2008). The power of a positive attitude: Discovering the key to success. American Management Association.
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Dyfyniad Arddull Chicago
Fritz, Roger. The Power of a Positive Attitude: Discovering the Key to Success. New York: American Management Association, 2008.
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Dyfyniad MLA
Fritz, Roger. The Power of a Positive Attitude: Discovering the Key to Success. American Management Association, 2008.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.