Tolley,George S, & Thomas,Vinod. (1982). Agricultural price policies and the developing countries. Johns Hopkins.
Dyfyniad Arddull ChicagoTolley,George S, and Thomas,Vinod. Agricultural Price Policies and the Developing Countries. Baltimore: Johns Hopkins, 1982.
Dyfyniad MLATolley,George S, and Thomas,Vinod. Agricultural Price Policies and the Developing Countries. Johns Hopkins, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.