Citazione Stile APA (7a Edizione)

Keene, C. (1981). The clue in the crossword cipher. Armada books.

Citazione stile Chigago Style (17a edizione)

Keene, Carolyn. The Clue in the Crossword Cipher. New York: Armada books, 1981.

Citatione MLA (9a ed.)

Keene, Carolyn. The Clue in the Crossword Cipher. Armada books, 1981.