APA (7th ed.) Citation

Copeland, R. W. (1971). How children learn mathematics (2nd printing.). New York [u.a.] : MacMillan.

Chicago Style (17th ed.) Citation

Copeland, Richard W. How Children Learn Mathematics. 2nd printing. New York [u.a.] : MacMillan, 1971.

MLA (9th ed.) Citation

Copeland, Richard W. How Children Learn Mathematics. 2nd printing. New York [u.a.] : MacMillan, 1971.

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