Drucker, P. F. (2015). Innovation and entrepreneurship: Practice and principles (2nd ed.). Routledge.
Chicago-čujuhus (17. p.)Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. 2nd ed. New York: Routledge, 2015.
MLA-čujuhus (9. p.)Drucker, Peter F. Innovation and Entrepreneurship: Practice and Principles. 2nd ed. Routledge, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.