Powdermaker, F., & Frank, J. D. (1953). Group psychotherapy: Studies in methodology of research and therapy. Published for the Commonwealth Fund by the Harvard University Press.
Dyfyniad Arddull ChicagoPowdermaker, Florence, and Jerome D. Frank. Group Psychotherapy: Studies in Methodology of Research and Therapy. Cambridge, MA: Published for the Commonwealth Fund by the Harvard University Press, 1953.
Dyfyniad MLAPowdermaker, Florence, and Jerome D. Frank. Group Psychotherapy: Studies in Methodology of Research and Therapy. Published for the Commonwealth Fund by the Harvard University Press, 1953.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.