Hopper, W. D. (1977). Canada's role in world agricultural development: Presented as the J.S. McLean Lecture at the University of Guelph, Guelph, Ontario, 4 November 1976. International Development Research Centre.
Chicago-Zitierstil (17. Ausg.)Hopper, William David. Canada's Role in World Agricultural Development: Presented as the J.S. McLean Lecture at the University of Guelph, Guelph, Ontario, 4 November 1976. Ottawa: International Development Research Centre, 1977.
MLA-Zitierstil (9. Ausg.)Hopper, William David. Canada's Role in World Agricultural Development: Presented as the J.S. McLean Lecture at the University of Guelph, Guelph, Ontario, 4 November 1976. International Development Research Centre, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.