Lua APA (7ú heag.)

Ong, P. S. (2001). Philippine biodiversity in crises. Philippine Star.

Lua i Stíl Chicago (17ú heag.)

Ong, Perry S. "Philippine Biodiversity in Crises." Philippine Star 2001.

Lua MLA (9ú heag.)

Ong, Perry S. "Philippine Biodiversity in Crises." Philippine Star, 2001.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.