APA (7th ed.) Citation

Underhill, R. G. (1977). Teaching elementary school mathematics (2nd ed.). Merrill.

Chicago Style (17th ed.) Citation

Underhill, Robert G. Teaching Elementary School Mathematics. 2nd ed. Columbus: Merrill, 1977.

MLA (9th ed.) Citation

Underhill, Robert G. Teaching Elementary School Mathematics. 2nd ed. Merrill, 1977.

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