National Archives (U.S.). (1948). Records of the Secretary of the Interior relating to wagon roads, 1857-1881: Letters received relating to several wagon roads in Oregon, 1866-1887. The National Archives.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Archives (U.S.). Records of the Secretary of the Interior Relating to Wagon Roads, 1857-1881: Letters Received Relating to Several Wagon Roads in Oregon, 1866-1887. Washington: The National Archives, 1948.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Archives (U.S.). Records of the Secretary of the Interior Relating to Wagon Roads, 1857-1881: Letters Received Relating to Several Wagon Roads in Oregon, 1866-1887. The National Archives, 1948.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.