Webber, B., & Ramsey, G. R. (1987). Postmarked Washington: An encyclopedia of postal history covering eleven counties of eastern Washington based on the research of the late Guy Reed Ramsey and other sources. Ye Galleon Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Webber, Bert, و Guy Reed Ramsey. Postmarked Washington: An Encyclopedia of Postal History Covering Eleven Counties of Eastern Washington Based on the Research of the Late Guy Reed Ramsey and Other Sources. Fairfield, Wash.: Ye Galleon Press, 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Webber, Bert, و Guy Reed Ramsey. Postmarked Washington: An Encyclopedia of Postal History Covering Eleven Counties of Eastern Washington Based on the Research of the Late Guy Reed Ramsey and Other Sources. Ye Galleon Press, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.