APA (7th ed.) Zitazioa
Barker, J. (1984). The Politics of agriculture in tropical Africa. Sage Publications.
Chicago Style (17th ed.) Zitazioa
Barker, Jonathan. The Politics of Agriculture in Tropical Africa. Beverly Hills: Sage Publications, 1984.
MLA (9th ed.) Zitazioa
Barker, Jonathan. The Politics of Agriculture in Tropical Africa. Sage Publications, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.