APA (7th ed.) Citation

Kirkpatrick, J. D., & Kirkpatrick, W. K. (2016). Kirkpatrick's four levels of training evaluation /. ATD Press,.

Chicago Style (17th ed.) Citation

Kirkpatrick, James D.,, and Wendy Kayser Kirkpatrick. Kirkpatrick's Four Levels of Training Evaluation /. Alexandria, Virginia :: ATD Press,, 2016.

MLA (8th ed.) Citation

Kirkpatrick, James D.,, and Wendy Kayser Kirkpatrick. Kirkpatrick's Four Levels of Training Evaluation /. ATD Press,, 2016.