APA
Bormann E. G., . (1969). Discussion and group methods. New York: Harper & Row Publishers.
Chicago
Bormann Ernest G, . 1969. Discussion and group methods. New York: Harper & Row Publishers.
Harvard
Bormann E. G., . (1969). Discussion and group methods. New York: Harper & Row Publishers.
MLA
Bormann Ernest G, . Discussion and group methods. New York: Harper & Row Publishers. 1969.