Valencia, C. DA pursues organic farming of upland rice in Bicol. The Philippine Star.
Lua i Stíl Chicago (17ú heag.)Valencia, Czeriza. "DA Pursues Organic Farming of Upland Rice in Bicol." The Philippine Star .
Lua MLA (9ú heag.)Valencia, Czeriza. "DA Pursues Organic Farming of Upland Rice in Bicol." The Philippine Star, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.