APA (7th ed.) Citation

Swain, R. L., & Nichols, E. D. (1965). Understanding arithmetic. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Swain, Robert L., and Eugene Douglas Nichols. Understanding Arithmetic. New York: Holt, Rinehart and Winston, 1965.

MLA (8th ed.) Citation

Swain, Robert L., and Eugene Douglas Nichols. Understanding Arithmetic. Holt, Rinehart and Winston, 1965.