Não informado. (1993). Journal of Agricultural and Applied Economics. Southern Agricultural Economics Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of Agricultural and Applied Economics. Auburn, Ala: Southern Agricultural Economics Association, 1993.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of Agricultural and Applied Economics. Southern Agricultural Economics Association, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.