APA (7th ed.) Citation

Pringle, P. T. (1993). Roadside geology of Mount St. Helens National Volcanic Monument and vicinity. Washington State Dept. of Natural Resources.

Chicago Style (17th ed.) Citation

Pringle, Patrick T. Roadside Geology of Mount St. Helens National Volcanic Monument and Vicinity. Olympia, WA: Washington State Dept. of Natural Resources, 1993.

MLA (8th ed.) Citation

Pringle, Patrick T. Roadside Geology of Mount St. Helens National Volcanic Monument and Vicinity. Washington State Dept. of Natural Resources, 1993.