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.
Цитирование в стиле Чикаго (17-е изд.)Washington (State). Division of Geology and Earth Resources, Association of Engineering Geologists. Washington State Section, и 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.
Цитирование MLA (8-е изд.)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.