Keene. (1951). The clue of the black keys. Grosset and Dunlap.
Chicago Style (17th ed.) CitationKeene. The Clue of the Black Keys. New York: Grosset and Dunlap, 1951.
MLA (8th ed.) CitationKeene. The Clue of the Black Keys. Grosset and Dunlap, 1951.
Warning: These citations may not always be 100% accurate.