Drucker, P. (1977). Management cases. Harper College Press.
Chicago-čujuhus (17. p.)Drucker, Peter. Management Cases. New York: Harper College Press, 1977.
MLA-čujuhus (9. p.)Drucker, Peter. Management Cases. Harper College Press, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.