Cita APA

Hawking, S. W. 1. (1989). A brief history of time: From the big bang to black holes. Toronto: Bantam Books.

Chicago Style Citation

Hawking, S. W. 1942-. A Brief History of Time: From the Big Bang to Black Holes. Toronto: Bantam Books, 1989.

Cita MLA

Hawking, S. W. 1942-. A Brief History of Time: From the Big Bang to Black Holes. Toronto: Bantam Books, 1989.

Atenció: Aquestes cites poden no estar 100% correctes.