APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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