APA (7th ed.) Citation

Chismore, W. D., & Hill, Q. M. A classification of educational subject matter.

Chicago Style (17th ed.) Citation

Chismore, W. Dale, and Quentin M. Hill. A Classification of Educational Subject Matter.

MLA (9th ed.) Citation

Chismore, W. Dale, and Quentin M. Hill. A Classification of Educational Subject Matter.

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