Gaya APA

Kirkpatrick, D, L., Kirkpatrick, J, D. (2006). Evaluating Training Programs : The Four Levels (cet 1-). Indonesia: Berret-Kohler Publisher .

Gaya MLA

Kirkpatrick, Donald, L., Kirkpatrick, James, D. "Evaluating Training Programs : The Four Levels". cet 1- Indonesia: Berret-Kohler Publisher , 2006. Buku Teks.