Não informado. (1953). Journal of the West African Institute for Oil Palm Research. West African Institute for Oil Palm Research.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of the West African Institute for Oil Palm Research. Benin City, Nigeria: West African Institute for Oil Palm Research, 1953.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of the West African Institute for Oil Palm Research. West African Institute for Oil Palm Research, 1953.
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