Light H R. (1969). Business executive /2e: A guide to effective performance in business (2nd ed.). Sir Isaac Pitman.
Trích dẫn kiểu ChicagoLight H R. Business Executive /2e: A Guide to Effective Performance in Business. 2nd ed. London: Sir Isaac Pitman, 1969.
Trích dẫn MLALight H R. Business Executive /2e: A Guide to Effective Performance in Business. 2nd ed. Sir Isaac Pitman, 1969.
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