Washington State Association of Counties, Washington Association of County Officials, Washington State Association of County Officials, & Municipal Research and Services Center of Washington. (1970). Directory of county officials in Washington State. Washington State Association of County Officials.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington State Association of Counties, Washington Association of County Officials, Washington State Association of County Officials, và Municipal Research and Services Center of Washington. Directory of County Officials in Washington State. Olympia, Wash.: Washington State Association of County Officials, 1970.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington State Association of Counties, et al. Directory of County Officials in Washington State. Washington State Association of County Officials, 1970.