Cita APA (7a ed.)

Keene, C. (1993). The clue in the crossword cipher. Grosset & Dunlap.

Cita Chicago Style (17a ed.)

Keene, Carolyn. The Clue in the Crossword Cipher. New York: Grosset & Dunlap, 1993.

Cita MLA (8a ed.)

Keene, Carolyn. The Clue in the Crossword Cipher. Grosset & Dunlap, 1993.

Precaución: Estas citas no son 100% exactas.