Geological Survey (U.S.), Lipman, P. W., & Mullineaux, D. R. (1982). The 1980 eruptions of Mount St. Helens, Washington. U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeological Survey (U.S.), Peter W. Lipman, और Donal Ray Mullineaux. The 1980 Eruptions of Mount St. Helens, Washington. [Reston, Va.?] : Washington, D.C.: U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeological Survey (U.S.), et al. The 1980 Eruptions of Mount St. Helens, Washington. U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1982.
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