Harvard Business Review. (2019). Focus. HBSP.
Chicago-čujuhus (17. p.)Harvard Business Review. Focus. Boston, U.S: HBSP, 2019.
MLA-čujuhus (9. p.)Harvard Business Review. Focus. HBSP, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.