Dyfyniad APA
Allen, L. A. (1969). The Principles of professional management. Louis A. Allen associates.
Dyfyniad Arddull Chicago
Allen, Louis A. The Principles of Professional Management. Calif.: Louis A. Allen associates, 1969.
Dyfyniad MLA
Allen, Louis A. The Principles of Professional Management. Louis A. Allen associates, 1969.
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