APA citiranje

Willoughby, S. S. (1967). Contemporary teaching of secondary school mathematics. New York: Wiley.

Trích dẫn kiểu Chicago

Willoughby, Stephen S. Contemporary Teaching of Secondary School Mathematics. New York: Wiley, 1967.

MLA citiranje

Willoughby, Stephen S. Contemporary Teaching of Secondary School Mathematics. New York: Wiley, 1967.

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