Ng, C. W. W., Simons, N. E., Menzies, B. K., Simons, N., & Menzies, B. (2004). A short cource in soil-structure engineering of deep foundations, excavations and tunnels. London: Thomas Telford.

Ng, Charles W. W., Noel E. Simons, Bruce Keith Menzies, Noel Simons, and Bruce Menzies. A Short Cource in Soil-structure Engineering of Deep Foundations, Excavations and Tunnels. London: Thomas Telford, 2004.

Ng, Charles W. W., et al. A Short Cource in Soil-structure Engineering of Deep Foundations, Excavations and Tunnels. London: Thomas Telford, 2004.