Bryan, T. S. (2018). The geysers of Yellowstone (Fifth edition.). University Press of Colorado.
Dyfyniad Arddull ChicagoBryan, T. Scott. The Geysers of Yellowstone. Fifth edition. Boulder: University Press of Colorado, 2018.
Dyfyniad MLABryan, T. Scott. The Geysers of Yellowstone. Fifth edition. University Press of Colorado, 2018.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.