De Vera-Ruiz, E. 196 nations back eco preservation. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)De Vera-Ruiz, Ellalyn. "196 Nations Back Eco Preservation." Manila Bulletin .
Lua MLA (9ú heag.)De Vera-Ruiz, Ellalyn. "196 Nations Back Eco Preservation." Manila Bulletin, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.