APA Style

Kirkpatrick, D, L., Kirkpatrick, J, D. (2006). Evaluating Training Programs: The Four Levels (3). San Francisco, CA: Berrett-Koehler.

MLA Style

Kirkpatrick, Donald, L.., Kirkpatrick, James, D.. "Evaluating Training Programs: The Four Levels". 3 San Francisco, CA: Berrett-Koehler, 2006. Text.