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Dyfyniad Arddull ChicagoGRUBER GARY R. GRADUATE MANAGEMENT ADMISSION TEST (GMAT). NEW YORK: MONARCH PRESS, 1980.
Dyfyniad MLAGRUBER GARY R. GRADUATE MANAGEMENT ADMISSION TEST (GMAT). MONARCH PRESS, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.