Pretty, J. N. (1988). Preference ranking. Northeast Rainfed Agricultural Development (NERAD) Project, Northeast Regional Office of Agriculture.
Citazione stile Chigago Style (17a edizione)Pretty, Jules N. Preference Ranking. Khon Kaen, Thailand: Northeast Rainfed Agricultural Development (NERAD) Project, Northeast Regional Office of Agriculture, 1988.
Citatione MLA (9a ed.)Pretty, Jules N. Preference Ranking. Northeast Rainfed Agricultural Development (NERAD) Project, Northeast Regional Office of Agriculture, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.