ebrary, Inc, & Brandt, P. R. (2011). Psychology of optimism. Nova Science Publishers.
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Dyfyniad Arddull Chicago
ebrary, Inc, and Phyllis R. Brandt. Psychology of Optimism. New York: Nova Science Publishers, 2011.
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Dyfyniad MLA
ebrary, Inc, and Phyllis R. Brandt. Psychology of Optimism. Nova Science Publishers, 2011.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.