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Dyfyniad Arddull ChicagoHoward, Michael Charles. Profits in Economic Theory. New York: St. Martin's Press, 1983.
Dyfyniad MLAHoward, Michael Charles. Profits in Economic Theory. St. Martin's Press, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.