Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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