Hawking, S. W. (1988). A brief history of time. Bantam Books.
Lua i Stíl Chicago (17ú heag.)Hawking, S. W. A Brief History of Time. New York: Bantam Books, 1988.
Lua MLA (8ú heag.)Hawking, S. W. A Brief History of Time. Bantam Books, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.