APA (7th ed.) Citation

Sumner, W. L. (1938). Teaching of arithmetic and elementary mathematics. Blackwell.

Chicago Style (17th ed.) Citation

Sumner, William Leslie. Teaching of Arithmetic and Elementary Mathematics. London: Blackwell, 1938.

MLA (8th ed.) Citation

Sumner, William Leslie. Teaching of Arithmetic and Elementary Mathematics. Blackwell, 1938.

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