Drucker, P. F. (1991). Innovation & entrepreneurship. Altrliated east- west.
Chicago-čujuhus (17. p.)Drucker, Peter F. Innovation & Entrepreneurship. New delhi: Altrliated east- west, 1991.
MLA-čujuhus (9. p.)Drucker, Peter F. Innovation & Entrepreneurship. Altrliated east- west, 1991.
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