APA استشهاد

Tolley,George S, & Thomas,Vinod. (1982). Agricultural price policies and the developing countries. Johns Hopkins.

استشهاد بنمط شيكاغو

Tolley,George S, و Thomas,Vinod. Agricultural Price Policies and the Developing Countries. Baltimore: Johns Hopkins, 1982.

MLA استشهاد

Tolley,George S, و Thomas,Vinod. Agricultural Price Policies and the Developing Countries. Johns Hopkins, 1982.