Cofnodi Dyfyniadau
Dyfyniad APA
ebrary, Inc, Langley, E. J., & Knowles, R. B. (2012). Psychology of sadness. Nova Science Publishers.
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Dyfyniad Arddull Chicago
ebrary, Inc, Emile J. Langley, and Roger B. Knowles. Psychology of Sadness. New York: Nova Science Publishers, 2012.
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Dyfyniad MLA
ebrary, Inc, et al. Psychology of Sadness. Nova Science Publishers, 2012.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.