Knutson,Ronald D, & Penn,J B. (1995). Agricultural and food policy (3.). Prentice Hall Education Career and technology.
استشهاد بنمط شيكاغوKnutson,Ronald D, و Penn,J B. Agricultural and Food Policy. 3. New Jersey: Prentice Hall Education Career and technology, 1995.
MLA استشهادKnutson,Ronald D, و Penn,J B. Agricultural and Food Policy. 3. Prentice Hall Education Career and technology, 1995.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.