Cita APA (7a ed.)

Hemingway, E. (1966). For whom the bell tolls. Penguin Books.

Cita Chicago Style (17a ed.)

Hemingway, Ernest. For Whom the Bell Tolls. Harmondsworth: Penguin Books, 1966.

Cita MLA (9a ed.)

Hemingway, Ernest. For Whom the Bell Tolls. Penguin Books, 1966.