Maidl, B., Thewes, M., & Maidl, U. (2013). Handbook of tunnel engineering (First edition.). Ernst & Sohn.
Cita Chicago (17th ed.)Maidl, Bernhard, Markus Thewes, i Ulrich Maidl. Handbook of Tunnel Engineering. First edition. Berlin: Ernst & Sohn, 2013.
Cita MLA (9th ed.)Maidl, Bernhard, et al. Handbook of Tunnel Engineering. First edition. Ernst & Sohn, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.