Cita APA (7a ed.)

Hawking Stephen. (2001). Universe in A Nutshell. Bantam Press.

Cita Chicago Style (17a ed.)

Hawking Stephen. Universe in A Nutshell. Sydney Uk: Bantam Press, 2001.

Cita MLA (9a ed.)

Hawking Stephen. Universe in A Nutshell. Bantam Press, 2001.