Παραπομπή APA

Hemingway, E. (1974). For whom the bell tolls. Penguin.

Παραπομπή Chicago Style

Hemingway, Ernest. For Whom the Bell Tolls. England: Penguin, 1974.

Παραπομπή MLA

Hemingway, Ernest. For Whom the Bell Tolls. Penguin, 1974.