Proceedings of the North American Tunneling 2006 Conference & Ozdemir, L. (2006). North American tunneling 2006 [electronic resource]: Proceedings of the North American tunneling conference 2006 ;10-15 June 2006, Chicago, USA. Netherlands : Taylor & Francis.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Proceedings of the North American Tunneling 2006 Conference و Levent Ozdemir. North American Tunneling 2006 [electronic Resource]: Proceedings of the North American Tunneling Conference 2006 ;10-15 June 2006, Chicago, USA. Netherlands : Taylor & Francis, 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Proceedings of the North American Tunneling 2006 Conference و Levent Ozdemir. North American Tunneling 2006 [electronic Resource]: Proceedings of the North American Tunneling Conference 2006 ;10-15 June 2006, Chicago, USA. Netherlands : Taylor & Francis, 2006.