APA (7th ed.) Citation

Schaaf, W. L. (1970). The high school mathematics library ([4th ed.].). National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Schaaf, William L. The High School Mathematics Library. [4th ed.]. Washington: National Council of Teachers of Mathematics, 1970.

MLA (8th ed.) Citation

Schaaf, William L. The High School Mathematics Library. [4th ed.]. National Council of Teachers of Mathematics, 1970.

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