APA (7th ed.) Citation

Hemingway, E. (1966). The old man and the sea. Penguin Books.

Chicago Style (17th ed.) Citation

Hemingway, Ernest. The Old Man and the Sea. Londres: Penguin Books, 1966.

MLA (9th ed.) Citation

Hemingway, Ernest. The Old Man and the Sea. Penguin Books, 1966.