Cita APA (7th ed.)
ebrary, Inc, Maidl, B., & Sturge, D. (2012). Mechanised shield tunnelling (2nd ed.). Ernst & Sohn.
Cita Chicago (17th ed.)
ebrary, Inc, Bernhard Maidl, i David Sturge. Mechanised Shield Tunnelling. 2nd ed. Berlin: Ernst & Sohn, 2012.
Cita MLA (9th ed.)
ebrary, Inc, et al. Mechanised Shield Tunnelling. 2nd ed. Ernst & Sohn, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.