APA aipamena

Charatan, F. (2003). Hard people. BMJ Publishing Group Ltd.

Chicago Style aipamena

Charatan, Fred. Hard People. BMJ Publishing Group Ltd, 2003.

MLA aipamena

Charatan, Fred. Hard People. BMJ Publishing Group Ltd, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.