APA (7th ed.) Citation

Keyes, K. S. (1963). How to develop your thinking ability.

Chicago Style (17th ed.) Citation

Keyes, Kenneth S. How to Develop Your Thinking Ability. 1963.

MLA (9th ed.) Citation

Keyes, Kenneth S. How to Develop Your Thinking Ability. 1963.

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