APA (7th ed.) Citation

Carrel, A. (1948). Man, the unknown. Penguin Books.

Chicago Style (17th ed.) Citation

Carrel, Alexis. Man, the Unknown. Penguin Books, 1948.

MLA (8th ed.) Citation

Carrel, Alexis. Man, the Unknown. Penguin Books, 1948.

Warning: These citations may not always be 100% accurate.