David Norman. (1994). FAO farm systems management series N.7: Farming systems development and soil conservation. Rome: FAO.
Chicago-stil citatDavid Norman. FAO Farm Systems Management Series N.7: Farming Systems Development and Soil Conservation. Rome: FAO, 1994.
MLA-referensDavid Norman. FAO Farm Systems Management Series N.7: Farming Systems Development and Soil Conservation. Rome: FAO, 1994.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.