Trettin, H. P. (1998). Pre-Carboniferous geology of the northern part of the Arctic Islands: Northern Heiberg Fold Belt, Clements Markham Fold Belt, and Pearya; northern Axel Heiberg and Ellesmere Islands. Geological Survey.
Chicago Style (17th ed.) CitationTrettin, Hans Peter. Pre-Carboniferous Geology of the Northern Part of the Arctic Islands: Northern Heiberg Fold Belt, Clements Markham Fold Belt, and Pearya; Northern Axel Heiberg and Ellesmere Islands. Ottawa: Geological Survey, 1998.
MLA (9th ed.) CitationTrettin, Hans Peter. Pre-Carboniferous Geology of the Northern Part of the Arctic Islands: Northern Heiberg Fold Belt, Clements Markham Fold Belt, and Pearya; Northern Axel Heiberg and Ellesmere Islands. Geological Survey, 1998.
Warning: These citations may not always be 100% accurate.