APA Citatie

Verderber, R. F., & Sellnow, D. D. (2018). The challenge of effective speaking in a digital age. Boston, MA: Cengage Learning.

Chicago Style citaat

Verderber, Rudolph F., en Deanna D. Sellnow. The Challenge of Effective Speaking in a Digital Age. Boston, MA: Cengage Learning, 2018.

MLA citatie

Verderber, Rudolph F., en Deanna D. Sellnow. The Challenge of Effective Speaking in a Digital Age. Boston, MA: Cengage Learning, 2018.