Não informado. (1966). Communication of the Department of Agricultural Research of the Royal Tropical Institute. Instituut voor de Tropen.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Communication of the Department of Agricultural Research of the Royal Tropical Institute. Amsterdam: Instituut voor de Tropen, 1966.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Communication of the Department of Agricultural Research of the Royal Tropical Institute. Instituut voor de Tropen, 1966.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.