Cita APA (7a ed.)
Hawking, S. (1988). A brief history of time: Stephen Hawking. Bantam Books.
Cita Chicago Style (17a ed.)
Hawking, Stephen. A Brief History of Time: Stephen Hawking. New York: Bantam Books, 1988.
Cita MLA (9a ed.)
Hawking, Stephen. A Brief History of Time: Stephen Hawking. Bantam Books, 1988.
Precaución: Estas citas no son 100% exactas.