APA (7th ed.) Citation

Zenzen, B. M. (1972). Leisurely learning meaningful mathematics. Math Books.

Chicago Style (17th ed.) Citation

Zenzen, Bertha M. Leisurely Learning Meaningful Mathematics. Beulah, Mich.: Math Books, 1972.

MLA (9th ed.) Citation

Zenzen, Bertha M. Leisurely Learning Meaningful Mathematics. Math Books, 1972.

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