Gaya APA

Kirkpatrick, D, L., Grate, D. (2006). Improving employee performance : through appraisal and coaching (2 th Ed.). New York: Amacom.

Gaya MLA

Kirkpatrick, Donald, L.., Grate, Dick. "Improving employee performance : through appraisal and coaching". 2 th Ed. New York: Amacom, 2006. Text.