APA (7th ed.) Citation

Underhill, R. G. (1972). Teaching elementary school mathematics. Merrill.

Chicago Style (17th ed.) Citation

Underhill, Robert G. Teaching Elementary School Mathematics. Columbus, Ohio: Merrill, 1972.

MLA (8th ed.) Citation

Underhill, Robert G. Teaching Elementary School Mathematics. Merrill, 1972.

Warning: These citations may not always be 100% accurate.