Não informado. (1992). Journal of Agricultural and Resource Economics. Western Agricultural Economics Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of Agricultural and Resource Economics. Bozeman, Mont: Western Agricultural Economics Association, 1992.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of Agricultural and Resource Economics. Western Agricultural Economics Association, 1992.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.