APA (7th ed.) Citation

Penn, J. B., & Irwin, G. D. (1977). Constrained input-output simulations of energy restrictions in the food and fiber system. Economic Research Service, U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Penn, J. B., and George D. Irwin. Constrained Input-output Simulations of Energy Restrictions in the Food and Fiber System. Washington, D.C.: Economic Research Service, U.S. Dept. of Agriculture, 1977.

MLA (9th ed.) Citation

Penn, J. B., and George D. Irwin. Constrained Input-output Simulations of Energy Restrictions in the Food and Fiber System. Economic Research Service, U.S. Dept. of Agriculture, 1977.