(2001). Yasay lauds Guingona move versus asbestos. Philippine Star.
Chicago Style aipamena"Yasay Lauds Guingona Move Versus Asbestos." Philippine Star 2001.
MLA aipamena"Yasay Lauds Guingona Move Versus Asbestos." Philippine Star, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.