Cita APA (7a ed.)

Fry, H. (2019). The walls have ears: The greatest intelligence operation of World War II. Yale University Press.

Cita Chicago Style (17a ed.)

Fry, Helen. The Walls Have Ears: The Greatest Intelligence Operation of World War II. New Haven ; London: Yale University Press, 2019.

Cita MLA (9a ed.)

Fry, Helen. The Walls Have Ears: The Greatest Intelligence Operation of World War II. Yale University Press, 2019.