Heller Robert. (1998). Managing Change. D K Publication.
Chicago-čujuhus (17. p.)Heller Robert. Managing Change. [s.l]: D K Publication, 1998.
MLA-čujuhus (9. p.)Heller Robert. Managing Change. D K Publication, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.