Pastrana, Q. V., & Stimac, J. (2004). Geothermal energy and the Philippines. AmCham Philippines Business Journal.
Chicago Style aipamenaPastrana, Quintin V., and James Stimac. "Geothermal Energy and the Philippines." AmCham Philippines Business Journal 2004.
MLA aipamenaPastrana, Quintin V., and James Stimac. "Geothermal Energy and the Philippines." AmCham Philippines Business Journal, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.