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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington State Association of Counties, Washington Association of County Officials, Washington State Association of County Officials, و Municipal Research and Services Center of Washington. Directory of County Officials in Washington State. Olympia, Wash.: Washington State Association of County Officials, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington State Association of Counties, et al. Directory of County Officials in Washington State. Washington State Association of County Officials, 1970.