You are in: South America Change location
An excellent book which is well written and provides the reader with detailed and informed examples of the application from theory to practice.
This is an excellent and thought provoking text regarding the topic of validity. It explores the topic through history to the current day, in a logical format.
The references to other works give the reader the opportunity to research further if they wish.
This is an essential book for one of the courses I am involved with and I will recommend it for others.
Ann Gravells www.anngravells.co.uk
