Cita APA (7th ed.)
Harnack, R. V. (1964). Group discussion: Theory and technique. Appleton-Century-Crofts.
Cita Chicago (17th ed.)
Harnack, R. Victor. Group Discussion: Theory and Technique. New York: Appleton-Century-Crofts, 1964.
Cita MLA (9th ed.)
Harnack, R. Victor. Group Discussion: Theory and Technique. Appleton-Century-Crofts, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.