Cita APA (7th ed.)

Hemingway, E. (1955). For whom the bell tolls (1a. ed.). Penguin Books.

Cita Chicago (17th ed.)

Hemingway, Ernest. For Whom the Bell Tolls. 1a. ed. Londres: Penguin Books, 1955.

Cita MLA (9th ed.)

Hemingway, Ernest. For Whom the Bell Tolls. 1a. ed. Penguin Books, 1955.