APA aipamena

(2007). Tobacco Control Online: Http://tc.bmj.com. BMJ Group.

Chicago Style aipamena

Tobacco Control Online: Http://tc.bmj.com. BMJ Group, 2007.

MLA aipamena

Tobacco Control Online: Http://tc.bmj.com. BMJ Group, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.