Não informado. (2004). Oxford Agrarian Studies. University of Oxford, Institute of Agricultural Economics.
Chicago-viite (17. p.)Não informado. Oxford Agrarian Studies. Oxford, Inglaterra: University of Oxford, Institute of Agricultural Economics, 2004.
MLA-viite (8. p.)Não informado. Oxford Agrarian Studies. University of Oxford, Institute of Agricultural Economics, 2004.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.