Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.