Keene, C. (1972). The clue in the old stagecoach. William Collins Sons and Co. Ltd..
Cita Chicago Style (17a ed.)Keene, Carolyn. The Clue in the Old Stagecoach. Great Britain: William Collins Sons and Co. Ltd., 1972.
Cita MLA (9a ed.)Keene, Carolyn. The Clue in the Old Stagecoach. William Collins Sons and Co. Ltd., 1972.
Precaución: Estas citas no son 100% exactas.