APA (7th ed.) Citation

Schaaf, W. L. (1973). The High School Mathematics Library. Fifth Edition.

Chicago Style (17th ed.) Citation

Schaaf, William L. The High School Mathematics Library. Fifth Edition. 1973.

MLA (9th ed.) Citation

Schaaf, William L. The High School Mathematics Library. Fifth Edition. 1973.

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