Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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