Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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