Ronda, R. A. (2001). GSIS auditors stage mass walkout. Philippine Star.
Chicago Style aipamenaRonda, Rainier Allan. "GSIS Auditors Stage Mass Walkout." Philippine Star 2001.
MLA aipamenaRonda, Rainier Allan. "GSIS Auditors Stage Mass Walkout." Philippine Star, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.