Tilling, R. I. (1984). Eruptions of Mount St. Helens: Past, present, and future. Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O..
Цитирование в стиле Чикаго (17-е изд.)Tilling, Robert I. Eruptions of Mount St. Helens: Past, Present, and Future. [Reston, Va.?] : Washington, D.C.: Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1984.
Цитирование MLA (8-е изд.)Tilling, Robert I. Eruptions of Mount St. Helens: Past, Present, and Future. Dept. of the Interior, U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1984.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.