APA (7th ed.) Citation

Keyes, K. S. (1950). How to develop your thinking ability. McGraw-Hill.

Chicago Style (17th ed.) Citation

Keyes, Kenneth S. How to Develop Your Thinking Ability. New York: McGraw-Hill, 1950.

MLA (9th ed.) Citation

Keyes, Kenneth S. How to Develop Your Thinking Ability. McGraw-Hill, 1950.