Παραπομπή APA

Gulley, H. E. (1960). Discussion, conference and group process. Holt, Rinehart and Winston.

Παραπομπή Chicago Style

Gulley, Halbert E. Discussion, Conference and Group Process. London: Holt, Rinehart and Winston, 1960.

Παραπομπή MLA

Gulley, Halbert E. Discussion, Conference and Group Process. Holt, Rinehart and Winston, 1960.