Peter Drucker. Profession of Management. HBR.
Chicago-čujuhus (17. p.)Peter Drucker. Profession of Management. HBR.
MLA-čujuhus (9. p.)Peter Drucker. Profession of Management. HBR.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.