Não informado. Philippine Journal of Soils. Department of Agriculture and Natural Resources.
Lua i Stíl Chicago (17ú heag.)Não informado. Philippine Journal of Soils. Manila: Department of Agriculture and Natural Resources.
Lua MLA (8ú heag.)Não informado. Philippine Journal of Soils. Department of Agriculture and Natural Resources.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.