Hawking, S. (1988). A brief history of time. Bantam.
Lua i Stíl Chicago (17ú heag.)Hawking, Stephen. A Brief History of Time. New York: Bantam, 1988.
Lua MLA (9ú heag.)Hawking, Stephen. A Brief History of Time. Bantam, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.