Brock, T. D., & Brock, L. (1971). Life in the geyser basins. Yellowstone Library and Museum.
Chicago Style (17th ed.) CitationBrock, Thomas D., and Louise Brock. Life in the Geyser Basins. Michigan: Yellowstone Library and Museum, 1971.
MLA (9th ed.) CitationBrock, Thomas D., and Louise Brock. Life in the Geyser Basins. Yellowstone Library and Museum, 1971.