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.
警告：這些引文格式不一定是100％准確.