Παραπομπή σε μορφή APA (7η εκδ.)

Knutson, R. (2007). Agricultural and food policy: Ronald D. Knutson...[et. al.] (6th ed.). Pearson/Prentice Hall.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Knutson, Ronald. Agricultural and Food Policy: Ronald D. Knutson...[et. Al.]. 6th ed. Upper Saddle River N.J.: Pearson/Prentice Hall, 2007.

Παραπομπή σε μορφή MLA (8th εκδ.)

Knutson, Ronald. Agricultural and Food Policy: Ronald D. Knutson...[et. Al.]. 6th ed. Pearson/Prentice Hall, 2007.