DRUCKER PETER F. (1985). INNOVATION AND ENTREPRENEURSHIP: PRACTICE AND PRINCIPLES. HARPER BUSINESS.
Chicago-viite (17. p.)DRUCKER PETER F. INNOVATION AND ENTREPRENEURSHIP: PRACTICE AND PRINCIPLES. NEW YORK: HARPER BUSINESS, 1985.
MLA-viite (9. p.)DRUCKER PETER F. INNOVATION AND ENTREPRENEURSHIP: PRACTICE AND PRINCIPLES. HARPER BUSINESS, 1985.
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