Bjornstad, B. N. (2006). On the trail of the Ice Age floods: A geological field guide to the mid-Columbia basin. Keokee Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBjornstad, Bruce N. On the Trail of the Ice Age Floods: A Geological Field Guide to the Mid-Columbia Basin. Sandpoint, Idaho: Keokee Books, 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBjornstad, Bruce N. On the Trail of the Ice Age Floods: A Geological Field Guide to the Mid-Columbia Basin. Keokee Books, 2006.
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