GeoCongress 2012 Oakland, Calif, ebrary, Inc, American Society of Civil Engineers. Geo-Institute, Rollins, K. M., & Zekkos, D. (2012). Geotechnical engineering state of the art and practice: Keynote lectures from GeoCongress 2012. American Society of Civil Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)GeoCongress 2012 Oakland, Calif, Inc ebrary, American Society of Civil Engineers. Geo-Institute, Kyle M. Rollins, و Dimitrios Zekkos. Geotechnical Engineering State of the Art and Practice: Keynote Lectures from GeoCongress 2012. Reston, Va.: American Society of Civil Engineers, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)GeoCongress 2012 Oakland, Calif, et al. Geotechnical Engineering State of the Art and Practice: Keynote Lectures from GeoCongress 2012. American Society of Civil Engineers, 2012.