Não informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Lua i Stíl Chicago (17ú heag.)Não informado. Oil Palm News. London: Tropical Products Institute, Oil Palm Advisory Bureau.
Lua MLA (8ú heag.)Não informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
