Fraser, R. (1968). Work: Twenty personal accounts. New York: Penguin Books.
Dyfyniad Arddull ChicagoFraser, Ronald. Work: Twenty Personal Accounts. New York: Penguin Books, 1968.
Dyfyniad MLAFraser, Ronald. Work: Twenty Personal Accounts. New York: Penguin Books, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.