Cita APA (7th ed.)

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.