Knutson, R. D., Boehm, W. T., & Penn, J. (1995). Agricultural and food policy (3rd ed.). Prentice Hall Education, Career & Technology.
Citace podle Chicago (17th ed.)Knutson, Ronald D., William T. Boehm, a J.B Penn. Agricultural and Food Policy. 3rd ed. Englewood Cliffs, N.J: Prentice Hall Education, Career & Technology, 1995.
Citace podle MLA (9th ed.)Knutson, Ronald D., et al. Agricultural and Food Policy. 3rd ed. Prentice Hall Education, Career & Technology, 1995.
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