APA (7th ed.) Citation

Swain & -. (1957). Understanding Arithmetic: - (1957.). America.

Chicago Style (17th ed.) Citation

Swain and -. Understanding Arithmetic: -. 1957. America: America, 1957.

MLA (9th ed.) Citation

Swain and -. Understanding Arithmetic: -. 1957. America, 1957.

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