Παραπομπή APA

Hawking, S. (2008). The theory of everything: The origin and fate of universe.

Παραπομπή Chicago Style

Hawking, Stephen. The Theory of Everything: The Origin and Fate of Universe. Jaico Publishing PVT LTD, 2008.

Παραπομπή MLA

Hawking, Stephen. The Theory of Everything: The Origin and Fate of Universe. 2008.