APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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