APA Citation

Hawking, L., Hawking, S., & Galfard, C. (2007). George's secret key to the universe. New York: Simon & Schuster Audio.

Chicago Style Citation

Hawking, Lucy., Stephen Hawking, and Christophe Galfard. George's Secret Key to the Universe. New York: Simon & Schuster Audio, 2007.

MLA Citation

Hawking, Lucy., Stephen Hawking, and Christophe Galfard. George's Secret Key to the Universe. New York: Simon & Schuster Audio, 2007.

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