Cita APA (7th ed.)

Penguin Books. (1945). Ten Years of Penguins: 1935-1945. Penguin Books.

Cita Chicago (17th ed.)

Penguin Books. Ten Years of Penguins: 1935-1945. Harmondsworth [u.a.]: Penguin Books, 1945.

Cita MLA (8th ed.)

Penguin Books. Ten Years of Penguins: 1935-1945. Penguin Books, 1945.