Singh, B., & Goel, R. K. (2011). Engineering rock mass classification: Tunnelling, foundations, and landslides. Butterworth-Heinemann.
Chicago Style (17th ed.) CitationSingh, Bhawani, and R. K. Goel. Engineering Rock Mass Classification: Tunnelling, Foundations, and Landslides. Burlington, Mass.: Butterworth-Heinemann, 2011.
MLA (9th ed.) CitationSingh, Bhawani, and R. K. Goel. Engineering Rock Mass Classification: Tunnelling, Foundations, and Landslides. Butterworth-Heinemann, 2011.
Warning: These citations may not always be 100% accurate.