Hitchcock, A. (1979). Alfred Hitchcock's solve-them-yourself mysteries. Armada.
Cita Chicago Style (17a ed.)Hitchcock, Alfred. Alfred Hitchcock's Solve-them-yourself Mysteries. London: Armada, 1979.
Cita MLA (8a ed.)Hitchcock, Alfred. Alfred Hitchcock's Solve-them-yourself Mysteries. Armada, 1979.
Precaución: Estas citas no son 100% exactas.