Ritson, C., & Harvey, D. (1997). The common agricultural policy (2nd ed.). CAB International.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিRitson, Christopher, এবং David Harvey. The Common Agricultural Policy. 2nd ed. New York, NY: CAB International, 1997.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিRitson, Christopher, এবং David Harvey. The Common Agricultural Policy. 2nd ed. CAB International, 1997.