Gaya APA

MAIDL, B., HERRENKNECHT, M. (2012). Mechanised Shield Tunnelling 2nd Edition (2). Berlin: Ernst Klett.

Gaya MLA

MAIDL, Bernhard., HERRENKNECHT, Martin. "Mechanised Shield Tunnelling 2nd Edition". 2 Berlin: Ernst Klett, 2012. Printed.