Book, W. F. (1932). Economy and technique of learning. Heath.
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Dyfyniad Arddull Chicago
Book, William F. Economy and Technique of Learning. Boston: Heath, 1932.
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Dyfyniad MLA
Book, William F. Economy and Technique of Learning. Heath, 1932.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.