Donald Kirkpatrick & James Kirkpatrick 
Transferring Learning to Behavior [PDF ebook] 
Using the Four Levels to Improve Performance

In this indispensable companion to the classic book Evaluating Training Programs The Four Levels, Don and Jim Kirkpatrick offer detailed guidance for putting any or all of the Four Levels into practice. In addition, they show how to decide what to evaluate, how to get managers to support the evaluation process, and how to use the Four Levels to construct a compelling chain of evidence demonstrating the contribution of training to the bottom line.