Day, R. H., & Shepherd, G. S. (1982). Economic analysis and agricultural policy. Iowa State University Press.
Cita Chicago (17th ed.)Day, Richard Hollis, i Geoffrey Seddon Shepherd. Economic Analysis and Agricultural Policy. Ames: Iowa State University Press, 1982.
Cita MLA (9th ed.)Day, Richard Hollis, i Geoffrey Seddon Shepherd. Economic Analysis and Agricultural Policy. Iowa State University Press, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.