Nuyda, D. G. (1997). Save Huyup-huyupan cave. IN Seeing green [column]. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Nuyda, Doris G. "Save Huyup-huyupan Cave. IN Seeing Green [column]." Philippine Daily Inquirer 1997.
Lua MLA (9ú heag.)Nuyda, Doris G. "Save Huyup-huyupan Cave. IN Seeing Green [column]." Philippine Daily Inquirer, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.