APA (7th ed.) Citation

Harnack, R. V., Jones, B. S., & Fest, T. B. (1977). Group discussion: Theory and technique (Second edition.). Prentice-Hall, Inc.

Chicago Style (17th ed.) Citation

Harnack, R. Victor, Barbara S. Jones, and Thorrel B. Fest. Group Discussion: Theory and Technique. Second edition. Englewood Cliffs, New Jersey: Prentice-Hall, Inc, 1977.

MLA (9th ed.) Citation

Harnack, R. Victor, et al. Group Discussion: Theory and Technique. Second edition. Prentice-Hall, Inc, 1977.