APA-Zitierstil (7. Ausg.)

Vengel, A. A., & Haag, J. (2009). 20 minutes to a top performer: Three fast and effective conversations to motivate, develop, and engage your employees ([First edition].). McGraw Hill-Ascent Audio.

Chicago-Zitierstil (17. Ausg.)

Vengel, Alan A., und John Haag. 20 Minutes to a Top Performer: Three Fast and Effective Conversations to Motivate, Develop, and Engage Your Employees. [First edition]. [Place of publication not identified]: McGraw Hill-Ascent Audio, 2009.

MLA-Zitierstil (9. Ausg.)

Vengel, Alan A., und John Haag. 20 Minutes to a Top Performer: Three Fast and Effective Conversations to Motivate, Develop, and Engage Your Employees. [First edition]. McGraw Hill-Ascent Audio, 2009.