APA aipamena

Hawking, S. W. (2001). universe in a nutshell. Bantam Press.

Chicago Style aipamena

Hawking, Stephen W. Universe in a Nutshell. London: Bantam Press, 2001.

MLA aipamena

Hawking, Stephen W. Universe in a Nutshell. Bantam Press, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.