APA (7th ed.) Citation

Brownell, W. A. (1967). Arithmetical abstractions: The movement toward conceptual maturity under differing systems of instruction. University of California Press.

Chicago Style (17th ed.) Citation

Brownell, William A. Arithmetical Abstractions: The Movement Toward Conceptual Maturity Under Differing Systems of Instruction. Berkeley: University of California Press, 1967.

MLA (9th ed.) Citation

Brownell, William A. Arithmetical Abstractions: The Movement Toward Conceptual Maturity Under Differing Systems of Instruction. University of California Press, 1967.