Cita APA (7th ed.)

Hawking, S. (1994). Black Holes And Baby Universes And Other Essays. Bantam Books.

Cita Chicago (17th ed.)

Hawking, Stephen. Black Holes And Baby Universes And Other Essays. London: Bantam Books, 1994.

Cita MLA (9th ed.)

Hawking, Stephen. Black Holes And Baby Universes And Other Essays. Bantam Books, 1994.