Washington (State). Division of Geology and Earth Resources. (1974). Energy resources of Washington. Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington (State). Division of Geology and Earth Resources. Energy Resources of Washington. Olympia, Wash.: Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources, 1974.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington (State). Division of Geology and Earth Resources. Energy Resources of Washington. Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources, 1974.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.