Gaya APA
Singh, B., Goel, R, K. (2006).
Tunneling in weak rocks: elsevier geo-engineering book series vol. 5 (Ed. 1).
Amsterdam:
Elsevier.
Gaya MLA
Singh, Bhawani., Goel, Rajnish, K..
"Tunneling in weak rocks: elsevier geo-engineering book series vol. 5".
Ed. 1
Amsterdam:
Elsevier,
2006.
Text.