Kennedy, W. J., Landman, N. H., & Cobban, W. A. (1996). The Maastrichtian ammonites Coahuililes sheltoni Böse, 1928, and Sphenodiscus pleurisepta (Conrad, 1857), from the Uppermost Pierre Shale and Basal Fox Hills Formation of Colorado and Wyoming. American Museum of Natural History.
Chicago-Zitierstil (17. Ausg.)Kennedy, William J., Neil H. Landman, und William A. Cobban. The Maastrichtian Ammonites Coahuililes Sheltoni Böse, 1928, and Sphenodiscus Pleurisepta (Conrad, 1857), from the Uppermost Pierre Shale and Basal Fox Hills Formation of Colorado and Wyoming. New York, NY: American Museum of Natural History, 1996.
MLA-Zitierstil (9. Ausg.)Kennedy, William J., et al. The Maastrichtian Ammonites Coahuililes Sheltoni Böse, 1928, and Sphenodiscus Pleurisepta (Conrad, 1857), from the Uppermost Pierre Shale and Basal Fox Hills Formation of Colorado and Wyoming. American Museum of Natural History, 1996.