Cita APA

Knutson, R. D., Penn, J. B., & Flinchbaugh, B. (1998). Agricultural and food policy (4th ed.). Prentice Hall.

Citación estilo Chicago

Knutson, Ronald D., J. B. Penn, and B.L Flinchbaugh. Agricultural and Food Policy. 4th ed. Upper Saddle River, N.J: Prentice Hall, 1998.

Cita MLA

Knutson, Ronald D., et al. Agricultural and Food Policy. 4th ed. Prentice Hall, 1998.