Atkinson, J. (2007). The mechanics of soils and foundations (2nd ed). Taylor & Francis.
British Standards Institution. (n.d.). Code of practice for site investigations: Vol. BS (fourth edition). code of practice for site investigations.
BS 5930:1999+A2:2010. (n.d.). BSI.
Craig, R. F., & Craig, R. F. (2004). Craig’s soil mechanics (7th ed). Spon Press.
Knappett, J., & Craig, R. F. (2012). Craig’s soil mechanics (8th ed). Spon.
Norbury, D. & ebrary, Inc. (2010). Soil and rock description in engineering practice. Whittles Pub. http://site.ebrary.com/lib/aber/Doc?id=10698308
Price, M. (1996). Introducing groundwater (2nd ed). Chapman & Hall.
Waltham, T. (1994). Foundations of engineering geology. Blackie Academic & Professional.