Conference on the History of the Trans-Mississippi West University of Colorado, Willard, J. F., & Goodykoontz, C. B. (1930). The trans-Mississippi West: Papers read at a conference held at the University of Colorado, June 18-June 21, 1929. University of Colorado.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Conference on the History of the Trans-Mississippi West University of Colorado, James F. Willard, و Colin Brummitt Goodykoontz. The Trans-Mississippi West: Papers Read at a Conference Held at the University of Colorado, June 18-June 21, 1929. Boulder: University of Colorado, 1930.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Conference on the History of the Trans-Mississippi West University of Colorado, et al. The Trans-Mississippi West: Papers Read at a Conference Held at the University of Colorado, June 18-June 21, 1929. University of Colorado, 1930.