Cita APA (7th ed.)

Penguin Books. (1956). The Penguin Story MCMXXXV MCMLVI. Penguin Books.

Cita Chicago (17th ed.)

Penguin Books. The Penguin Story MCMXXXV MCMLVI. Harmondsworth [u.a.]: Penguin Books, 1956.

Cita MLA (8th ed.)

Penguin Books. The Penguin Story MCMXXXV MCMLVI. Penguin Books, 1956.