Hartley, P. (2010). Business Communication.
Chicago-čujuhus (17. p.)Hartley, Peter. Business Communication. 2010.
MLA-čujuhus (9. p.)Hartley, Peter. Business Communication. 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.