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.