Greenshields, B. (1989). Government intervention in agriculture: Causes and effect. International Association of Agricultural economists.
Chicago Style aipamenaGreenshields, B. Government Intervention in Agriculture: Causes and Effect. U K: International Association of Agricultural economists, 1989.
MLA aipamenaGreenshields, B. Government Intervention in Agriculture: Causes and Effect. International Association of Agricultural economists, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.