McKillup, Steve. Statistics Explained: An Introductory Guide for Life Scientists. Illustrated edition, Cambridge University Press, 2006, http://ezproxy.library.qmul.ac.uk/login?url=http://www.vlebooks.com/vleweb/product/openreader?id=QMUL&isbn=9780511566950&uid=^u.
---. Statistics Explained: An Introductory Guide for Life Scientists. Cambridge University Press, 2011.