Denver Geotechnical Symposium, American Society of Civil Engineers. Colorado Section. Geotechnical Group, Association of Environmental & Engineering Geologists. Rocky Mountain Section, Colorado Association of Geotechnical Engineers, ebrary, Inc, Wiltshire, R. L., . . . Goss, C. M. (2007). Geo-volution: The evolution of Colorado's geological and geotechnical engineering practice : proceedings of the 2006 Biennial Geotechnical Seminar, November 10, 2006, Denver, Colorado. American Society of Civil Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Denver Geotechnical Symposium, American Society of Civil Engineers. Colorado Section. Geotechnical Group, Association of Environmental & Engineering Geologists. Rocky Mountain Section, Colorado Association of Geotechnical Engineers, Inc ebrary, Richard L. Wiltshire, Minal L. Parekh, و Christoph M. Goss. Geo-volution: The Evolution of Colorado's Geological and Geotechnical Engineering Practice : Proceedings of the 2006 Biennial Geotechnical Seminar, November 10, 2006, Denver, Colorado. Reston, Va.: American Society of Civil Engineers, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Denver Geotechnical Symposium, et al. Geo-volution: The Evolution of Colorado's Geological and Geotechnical Engineering Practice : Proceedings of the 2006 Biennial Geotechnical Seminar, November 10, 2006, Denver, Colorado. American Society of Civil Engineers, 2007.