Drucker, P. F. (1974). Management: Tasks, responsibilities, practices. Harper & Row.
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Dyfyniad Arddull Chicago
Drucker, Peter F. Management: Tasks, Responsibilities, Practices. New York: Harper & Row, 1974.
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Dyfyniad MLA
Drucker, Peter F. Management: Tasks, Responsibilities, Practices. Harper & Row, 1974.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.