APA (7th ed.) Citation

Keene. (1981). The twin dilemma. Grosset and Dunlap.

Chicago Style (17th ed.) Citation

Keene. The Twin Dilemma. New York: Grosset and Dunlap, 1981.

MLA (8th ed.) Citation

Keene. The Twin Dilemma. Grosset and Dunlap, 1981.

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