Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. Harper & Row.
Chicago-čujuhus (17. p.)Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. New York: Harper & Row, 1985.
MLA-čujuhus (9. p.)Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. Harper & Row, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.