Thelen, H. A. (1954). Dynamics of groups at work. Univ. of Chicago.
Dyfyniad Arddull ChicagoThelen, Herbert A. Dynamics of Groups at Work. Chicago: Univ. of Chicago, 1954.
Dyfyniad MLAThelen, Herbert A. Dynamics of Groups at Work. Univ. of Chicago, 1954.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.