APA (7th ed.) Zitazioa
Allen, L. A. (1969). The Principles of professional management. Louis A. Allen associates.
Chicago Style (17th ed.) Zitazioa
Allen, Louis A. The Principles of Professional Management. Calif.: Louis A. Allen associates, 1969.
MLA (9th ed.) Zitazioa
Allen, Louis A. The Principles of Professional Management. Louis A. Allen associates, 1969.
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