APA (7th ed.) Zitazioa
Upton, M. (1973). Farm management in Africa: The principles of production and planning. Oxford.
Chicago Style (17th ed.) Zitazioa
Upton, Martin. Farm Management in Africa: The Principles of Production and Planning. London: Oxford, 1973.
MLA (9th ed.) Zitazioa
Upton, Martin. Farm Management in Africa: The Principles of Production and Planning. Oxford, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.