Citazione Stile APA (7a Edizione)

Keene, C. (1972). The clue in the old stagecoach. William Collins Sons and Co. Ltd..

Citazione stile Chigago Style (17a edizione)

Keene, Carolyn. The Clue in the Old Stagecoach. Great Britain: William Collins Sons and Co. Ltd., 1972.

Citatione MLA (9a ed.)

Keene, Carolyn. The Clue in the Old Stagecoach. William Collins Sons and Co. Ltd., 1972.