Drucker, P. F. (1977). An introductory view of management. Harper's College Press.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. An Introductory View of Management. New York: Harper's College Press, 1977.
Lua MLA (9ú heag.)Drucker, Peter F. An Introductory View of Management. Harper's College Press, 1977.
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