Kirkpatrick, D. L. (1994). Evaluating training programs: The four levels. Berret-Koehler.
Cita Chicago (17th ed.)Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. San Francisco: Berret-Koehler, 1994.
Cita MLA (9th ed.)Kirkpatrick, Donald L. Evaluating Training Programs: The Four Levels. Berret-Koehler, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.