Geological Survey (U.S.), Washington (State). Division of Mines and Geology, & United States. Congress. Senate. Committee on Interior and Insular Affairs. (1978). Geology of Washington. State of Washington, Dept. of Natural Resources.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Geological Survey (U.S.), Washington (State). Division of Mines and Geology, و United States. Congress. Senate. Committee on Interior and Insular Affairs. Geology of Washington. Olympia: State of Washington, Dept. of Natural Resources, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Geological Survey (U.S.), et al. Geology of Washington. State of Washington, Dept. of Natural Resources, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.