Coontz, S. (1965). Productive Labour and effective demand. Routledge & Keegan Paul.
Dyfyniad Arddull ChicagoCoontz, Sydney.H. Productive Labour and Effective Demand. London: Routledge & Keegan Paul, 1965.
Dyfyniad MLACoontz, Sydney.H. Productive Labour and Effective Demand. Routledge & Keegan Paul, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.