APA aipamena

Hawking S. Stephen. (2001). The Universe in Nutshell. London, Bantam Press, 2001.

Chicago Style aipamena

Hawking S. Stephen. The Universe in Nutshell. London, Bantam Press, 2001, 2001.

MLA aipamena

Hawking S. Stephen. The Universe in Nutshell. London, Bantam Press, 2001, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.