APA (7th ed.) Citation

Schaaf, W. L. (1969). Basic concepts of elementary mathematics (3rd ed.). Wiley.

Chicago Style (17th ed.) Citation

Schaaf, William Leonard. Basic Concepts of Elementary Mathematics. 3rd ed. New York: Wiley, 1969.

MLA (9th ed.) Citation

Schaaf, William Leonard. Basic Concepts of Elementary Mathematics. 3rd ed. Wiley, 1969.

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