Washington (State). Division of Geology and Earth Resources, Association of Engineering Geologists. Washington State Section, & Galster, R. W. (1989). Engineering geology in Washington. Washington State Dept. of Natural Resources, Division of Geology and Earth Resources.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington (State). Division of Geology and Earth Resources, Association of Engineering Geologists. Washington State Section, và Richard W. Galster. Engineering Geology in Washington. [Olympia, WA] (Mail Stop PY-12, Olympia 98504): Washington State Dept. of Natural Resources, Division of Geology and Earth Resources, 1989.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington (State). Division of Geology and Earth Resources, et al. Engineering Geology in Washington. Washington State Dept. of Natural Resources, Division of Geology and Earth Resources, 1989.