For the entire publication:
Mossop, G.D. and Shetsen, I., comp. (1994): Geological atlas of the
Western Canada Sedimentary Basin; Canadian Society of Petroleum Geologists
and Alberta Research Council, URL <http://www.ags.gov.ab.ca/publications/wcsb_atlas/atlas.html>,
[Date last accessed online].
For specific chapters, reference the corresponding author. Example:
O'Connell, S.C. (1994): Geological history of the Peace River Arch; in Geological
Atlas of the Western Canada Sedimentary Basin, G.D. Mossop and I. Shetsen
(comp.), Canadian Society of Petroleum Geologists and Alberta Research
Council, URL <http://www.ags.gov.ab.ca/publications/wcsb_atlas/atlas.html>,
[Date last accessed online].
