HARVARD BUSINESS REVIEW. (1964). CONTROL: PART I. HARVARD BUSINESS REVIEW.
Dyfyniad Arddull ChicagoHARVARD BUSINESS REVIEW. CONTROL: PART I. BOSTON: HARVARD BUSINESS REVIEW, 1964.
Dyfyniad MLAHARVARD BUSINESS REVIEW. CONTROL: PART I. HARVARD BUSINESS REVIEW, 1964.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.