Saskatchewan Research Council, Canada. Centre for Mineral and Energy Technology, & Dyck, J. H. (1980). Quality and occurrence of coal in southern Saskatchewan, Canada. Saskatchewan Research Council.
Chicago-referens (17:e uppl.)Saskatchewan Research Council, Canada. Centre for Mineral and Energy Technology, och J. H. Dyck. Quality and Occurrence of Coal in Southern Saskatchewan, Canada. Saskatoon: Saskatchewan Research Council, 1980.
MLA-referens (8:e uppl.)Saskatchewan Research Council, et al. Quality and Occurrence of Coal in Southern Saskatchewan, Canada. Saskatchewan Research Council, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.