APA (7th ed.) Citation

Schaaf, W. L. (1976). The high school mathematics library (6th ed.). National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Schaaf, William Leonard. The High School Mathematics Library. 6th ed. Reston, Va.: National Council of Teachers of Mathematics, 1976.

MLA (9th ed.) Citation

Schaaf, William Leonard. The High School Mathematics Library. 6th ed. National Council of Teachers of Mathematics, 1976.