Harris (2005), p. 133. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 144. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), pp. 146-147. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), pp. 147-148. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 149. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
Harris (2005), p. 134. (EN) S.L. Harris, Lassen Peak, in Fire Mountains of the West: The Cascade and Mono Lake Volcanoes, 3ª ed., Missoula, Mountain Press Publishing Company, 2005, ISBN0-87842-511-X.
craterlakeinstitute.com
(EN) Crater Lake Institute, Swimming, su craterlakeinstitute.com, Università statale dell'Oregon State University. URL consultato il 7 agosto 2021.
(EN) Elena Gibboni, CMG Maps Bottom of Crater Lake, Oregon, su soundwaves.usgs.gov, USGS, settembre 2000. URL consultato il 30 luglio 2021 (archiviato dall'url originale il 28 maggio 2010).