APA Style
Kirkpatrick, D, L., Kirkpatrick, J, D. (2006).
Evaluating training programs: the four levels (Third Edition).
san francisco:
Berret-Koehler Publisher.
MLA Style
Kirkpatrick, Donald, L.., Kirkpatrick, James, D.
"Evaluating training programs: the four levels".
Third Edition
san francisco:
Berret-Koehler Publisher,
2006.
Text.