Hawking, & Sagan. (1989). A brief history of time: From the big bang to black holes (Updated and expanded ed.). New York: Bantam Books.
Chicago Style CitationHawking, and Sagan. A Brief History of Time: From the Big Bang to Black Holes. Updated and expanded ed. New York: Bantam Books, 1989.
MLA CitationHawking, and Sagan. A Brief History of Time: From the Big Bang to Black Holes. Updated and expanded ed. New York: Bantam Books, 1989.
Warning: These citations may not always be 100% accurate.