Ruggiero, V. R. (1991). The art of thinking: A guide to critical and creative thought (3rd.ed.). Harper Collins.
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Dyfyniad Arddull Chicago
Ruggiero, Vincent Ryan. The Art of Thinking: A Guide to Critical and Creative Thought. 3rd.ed. New York: Harper Collins, 1991.
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Dyfyniad MLA
Ruggiero, Vincent Ryan. The Art of Thinking: A Guide to Critical and Creative Thought. 3rd.ed. Harper Collins, 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.