APA (7th ed.) Citation

Lennes, N., Rogers, D. C., & Traver, L. (1953). Learning Arithmetic. Laidlaw Brothers.

Chicago Style (17th ed.) Citation

Lennes, N.J, Don C. Rogers, and L.R Traver. Learning Arithmetic. Laidlaw Brothers, 1953.

MLA (8th ed.) Citation

Lennes, N.J, et al. Learning Arithmetic. Laidlaw Brothers, 1953.