Urff, W. v. (1992). The issue of sustainability in third world food production. Pakistan Inst. of Development Economics.
Chicago-Zitierstil (17. Ausg.)Urff, Winfried von. The Issue of Sustainability in Third World Food Production. Islamabad: Pakistan Inst. of Development Economics, 1992.
MLA-Zitierstil (9. Ausg.)Urff, Winfried von. The Issue of Sustainability in Third World Food Production. Pakistan Inst. of Development Economics, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.