APA (7th ed.) Citation

Hoblitt, R. P. (1986). Observations of the eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Hoblitt, Richard P. Observations of the Eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey, 1986.

MLA (9th ed.) Citation

Hoblitt, Richard P. Observations of the Eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington. Dept. of the Interior, U.S. Geological Survey, 1986.