APA (7th ed.) Citation

Hawking, S. W. (1988). A brief history of time. Bantam Books.

Chicago Style (17th ed.) Citation

Hawking, S. W. A Brief History of Time. New York: Bantam Books, 1988.

MLA (8th ed.) Citation

Hawking, S. W. A Brief History of Time. Bantam Books, 1988.