University of Colorado Boulder. Center of the American West, Travis, W. R., Robb, J. J., Limerick, P. N., Wilkinson, C., & Goin, P. (1997). Atlas of the new West: Portrait of a changing region. W.W. Norton & Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of Colorado Boulder. Center of the American West, William R. Travis, James J. Robb, Patricia Nelson Limerick, Charles Wilkinson, و Peter Goin. Atlas of the New West: Portrait of a Changing Region. New York: W.W. Norton & Company, 1997.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)University of Colorado Boulder. Center of the American West, et al. Atlas of the New West: Portrait of a Changing Region. W.W. Norton & Company, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.