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-viite (17. p.)Saskatchewan Research Council, Canada. Centre for Mineral and Energy Technology, ja J. H. Dyck. Quality and Occurrence of Coal in Southern Saskatchewan, Canada. Saskatoon: Saskatchewan Research Council, 1980.
MLA-viite (8. p.)Saskatchewan Research Council, et al. Quality and Occurrence of Coal in Southern Saskatchewan, Canada. Saskatchewan Research Council, 1980.
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