Keene. (1981). The twin dilemma. Grosset and Dunlap.
Chicago Style (17th ed.) CitationKeene. The Twin Dilemma. New York: Grosset and Dunlap, 1981.
MLA (8th ed.) CitationKeene. The Twin Dilemma. Grosset and Dunlap, 1981.
Warning: These citations may not always be 100% accurate.