Wilkinson, B. W. (1978). Trends in Canada's mineral trade. Queen's University of Belfast. Centre for Resource Studies.
Citazione stile Chigago Style (17a edizione)Wilkinson, Bruce W. Trends in Canada's Mineral Trade. Kingston, Ont: Queen's University of Belfast. Centre for Resource Studies, 1978.
Citatione MLA (9a ed.)Wilkinson, Bruce W. Trends in Canada's Mineral Trade. Queen's University of Belfast. Centre for Resource Studies, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.