APA (7th ed.) Citation

Johnson, D. M. (1961). Psychology: A problem-solving approach. Harper.

Chicago Style (17th ed.) Citation

Johnson, Donald McEwen. Psychology: A Problem-solving Approach. New York: Harper, 1961.

MLA (9th ed.) Citation

Johnson, Donald McEwen. Psychology: A Problem-solving Approach. Harper, 1961.

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