Sy, G. S. (2008). Kidney & urinary tract infections. IN Life extension [column]. Manila Bulletin.
Chicago Style aipamenaSy, Gary S. "Kidney & Urinary Tract Infections. IN Life Extension [column]." Manila Bulletin 2008.
MLA aipamenaSy, Gary S. "Kidney & Urinary Tract Infections. IN Life Extension [column]." Manila Bulletin, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.