Kool, M. (1994). Buying behaviour of farmers. Wageningen.
Chicago Style aipamenaKool, Maarten. Buying Behaviour of Farmers. Netherlands: Wageningen, 1994.
MLA aipamenaKool, Maarten. Buying Behaviour of Farmers. Wageningen, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.