Cita APA (7th ed.)

Dyall, V. (1954). Unsolved mysteries: A collection of weird problems. Hutchinson.

Cita Chicago (17th ed.)

Dyall, Valentine. Unsolved Mysteries: A Collection of Weird Problems. London: Hutchinson, 1954.

Cita MLA (8th ed.)

Dyall, Valentine. Unsolved Mysteries: A Collection of Weird Problems. Hutchinson, 1954.