Não informado. (1996). Agriculture and environment for developing regions. Royal Tropical Institute.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Agriculture and Environment for Developing Regions. Amsterdam: Royal Tropical Institute, 1996.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Agriculture and Environment for Developing Regions. Royal Tropical Institute, 1996.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.