APA (7th ed.) Citation

Schaaf, W. L. (1960). Basic concepts of elementary mathematics (2nd.). John Wiley and Son, Inc.

Chicago Style (17th ed.) Citation

Schaaf, William Leonard. Basic Concepts of Elementary Mathematics. 2nd. U.S.A: John Wiley and Son, Inc, 1960.

MLA (9th ed.) Citation

Schaaf, William Leonard. Basic Concepts of Elementary Mathematics. 2nd. John Wiley and Son, Inc, 1960.