Cita APA (7th ed.)

Singh, B., & Goel, R. K. (2011). Engineering rock mass classification: Tunneling, foundations, and landslides. Butterworth-Heinemann.

Cita Chicago (17th ed.)

Singh, Bhawani, i R. K. Goel. Engineering Rock Mass Classification: Tunneling, Foundations, and Landslides. Waltham, MA: Butterworth-Heinemann, 2011.

Cita MLA (9th ed.)

Singh, Bhawani, i R. K. Goel. Engineering Rock Mass Classification: Tunneling, Foundations, and Landslides. Butterworth-Heinemann, 2011.