APA-Zitierstil (7. Ausg.)

Verderber, R. F., Sellnow, D. D., & Verderber, K. S. 1. (2018). The Challenge of effective speaking: In a digital age (17th edition.). Cengage Learning.

Chicago-Zitierstil (17. Ausg.)

Verderber, Rudolph F., Deanna D. Sellnow, und Kathleen S. 1949 Verderber. The Challenge of Effective Speaking: In a Digital Age. 17th edition. Boston, MA: Cengage Learning, 2018.

MLA-Zitierstil (9. Ausg.)

Verderber, Rudolph F., et al. The Challenge of Effective Speaking: In a Digital Age. 17th edition. Cengage Learning, 2018.