Washington (State). Division of Mines and Mining, Washington (State). Division of Mines and Geology, & Washington (State). Division of Geology and Earth Resources. Directory of Washington mining operations. Department of Conservation and Development, Division of Mines and Geology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington (State). Division of Mines and Mining, Washington (State). Division of Mines and Geology, و Washington (State). Division of Geology and Earth Resources. Directory of Washington Mining Operations. Olympia, Wash.: Department of Conservation and Development, Division of Mines and Geology.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington (State). Division of Mines and Mining, et al. Directory of Washington Mining Operations. Department of Conservation and Development, Division of Mines and Geology.