Hulbert, A. B. (1934). The call of the Columbia: Iron men and saints take the Oregon trail. The Stewart commission of Colorado college and [Denver] The Denver public library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hulbert, Archer Butler. The Call of the Columbia: Iron Men and Saints Take the Oregon Trail. [Colorado Springs]: The Stewart commission of Colorado college and [Denver] The Denver public library, 1934.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hulbert, Archer Butler. The Call of the Columbia: Iron Men and Saints Take the Oregon Trail. The Stewart commission of Colorado college and [Denver] The Denver public library, 1934.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.