Pearson, J. C., & Nelson, P. E. (1994). Understanding & sharing: An introduction to speech communication (6th ed.). WCB Brown & Benchmark Publishers.

Pearson, Judy C., and Paul E. Nelson. Understanding & Sharing: An Introduction to Speech Communication. 6th ed. Madison, Wis.: WCB Brown & Benchmark Publishers, 1994.

Pearson, Judy C., and Paul E. Nelson. Understanding & Sharing: An Introduction to Speech Communication. 6th ed. WCB Brown & Benchmark Publishers, 1994.