APA (7th ed.) Citation

Korosec, M. A., Rigby, J. G., & Stoffel, K. L. (1980). The 1980 eruption of Mount St. Helens, Washington, part I: March 20-May 19, 1980. Washington State Department of Natural Resources, Division of Geology and Earth Resources.

Chicago Style (17th ed.) Citation

Korosec, M. A., James G. Rigby, and Keith L. Stoffel. The 1980 Eruption of Mount St. Helens, Washington, Part I: March 20-May 19, 1980. Olympia, Wash.: Washington State Department of Natural Resources, Division of Geology and Earth Resources, 1980.

MLA (9th ed.) Citation

Korosec, M. A., et al. The 1980 Eruption of Mount St. Helens, Washington, Part I: March 20-May 19, 1980. Washington State Department of Natural Resources, Division of Geology and Earth Resources, 1980.