Não informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Citação do estilo Chicago (17ª ed.)Não informado. Oil Palm News. London: Tropical Products Institute, Oil Palm Advisory Bureau.
Citação MLA (8ª ed.)Não informado. Oil Palm News. Tropical Products Institute, Oil Palm Advisory Bureau.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.