APA (7th ed.) Citation

Orwell, G. (1989). Nineteen eighty four. Penguin Books.

Chicago Style (17th ed.) Citation

Orwell, George. Nineteen Eighty Four. Londres: Penguin Books, 1989.

MLA (9th ed.) Citation

Orwell, George. Nineteen Eighty Four. Penguin Books, 1989.