Παραπομπή APA

Hawking,, S. (1993). Hawking on the big bang and black holes (1st.). World Scientific.

Παραπομπή Chicago Style

Hawking,, Stephen. Hawking on the Big Bang and Black Holes. 1st. Singapore: World Scientific, 1993.

Παραπομπή MLA

Hawking,, Stephen. Hawking on the Big Bang and Black Holes. 1st. World Scientific, 1993.