APA (7th ed.) Citation

Howard, K. S. (1967). The enjoyment of chess problems (4th ed.). Dover.

Chicago Style (17th ed.) Citation

Howard, Kenneth Samuel. The Enjoyment of Chess Problems. 4th ed. New York: Dover, 1967.

MLA (9th ed.) Citation

Howard, Kenneth Samuel. The Enjoyment of Chess Problems. 4th ed. Dover, 1967.