APA (7e ed.) Bronvermelding

Kirkpatrick, D. L. (1998). Evaluating training programs: The four levels (2nd ed.). Berrett-Koehler Publishers.

Chicago (17e ed.) Bronvermelding

Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. 2nd ed. San Francisco: Berrett-Koehler Publishers, 1998.

MLA (9e ed.) Bronvermelding

Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. 2nd ed. Berrett-Koehler Publishers, 1998.