APA (7th ed.) Zitazioa
Krakor, R. (2012). Endoscopic mitral valve surgery: Handbook of minimal-invasive cardiac surgery. Walter de Gruyter.
Chicago Style (17th ed.) Zitazioa
Krakor, Ralf. Endoscopic Mitral Valve Surgery: Handbook of Minimal-invasive Cardiac Surgery. Berlin: Walter de Gruyter, 2012.
MLA (9th ed.) Zitazioa
Krakor, Ralf. Endoscopic Mitral Valve Surgery: Handbook of Minimal-invasive Cardiac Surgery. Walter de Gruyter, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.