Allen, L. A. (1969). The Principles of professional management. Louis A. Allen associates.
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Dyfyniad Arddull Chicago
Allen, Louis A. The Principles of Professional Management. Calif.: Louis A. Allen associates, 1969.
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Dyfyniad MLA
Allen, Louis A. The Principles of Professional Management. Louis A. Allen associates, 1969.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.