Willoughby, S. S. (1967). Contemporary teaching of secondary school mathematics. Wiley.
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Dyfyniad Arddull Chicago
Willoughby, Stephen S. Contemporary Teaching of Secondary School Mathematics. New York: Wiley, 1967.
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Dyfyniad MLA
Willoughby, Stephen S. Contemporary Teaching of Secondary School Mathematics. Wiley, 1967.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.