Ginsberg, M. (1921). Psychology of society. London: University Paperbacks.
Dyfyniad Arddull ChicagoGinsberg, Morris. Psychology of Society. London: University Paperbacks, 1921.
Dyfyniad MLAGinsberg, Morris. Psychology of Society. London: University Paperbacks, 1921.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.