Cita APA (7th ed.)

Ley, A. C. (1970). Letters for a spy. Hale.

Cita Chicago (17th ed.)

Ley, Alice Chetwynd. Letters for a Spy. London: Hale, 1970.

Cita MLA (8th ed.)

Ley, Alice Chetwynd. Letters for a Spy. Hale, 1970.