APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.