Gaya APA

SINGH, B, ;, G, R. (2011). Engineering Rocks Mass Classification ; Tunneling, Foundations, and Landslides . : Elsevier.

Gaya MLA

SINGH, Bhawani, ;, GOEL,, R.K.. "Engineering Rocks Mass Classification ; Tunneling, Foundations, and Landslides". : Elsevier, 2011. Buku.