APA (7th ed.) Citation

Keyes & Key. (1950). How to develop your thinking ability. Mc Graw-Hill.

Chicago Style (17th ed.) Citation

Keyes and Key. How to Develop Your Thinking Ability. New York: Mc Graw-Hill, 1950.

MLA (8th ed.) Citation

Keyes and Key. How to Develop Your Thinking Ability. Mc Graw-Hill, 1950.