Hawking, S. (1994). Black Holes And Baby Universes And Other Essays. Bantam Books.
Citazione stile Chigago Style (17a edizione)Hawking, Stephen. Black Holes And Baby Universes And Other Essays. London: Bantam Books, 1994.
Citatione MLA (9a ed.)Hawking, Stephen. Black Holes And Baby Universes And Other Essays. Bantam Books, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.