Karlson David. (2004). Marketing Your Consulting or Professional Services. Viva Books.
Chicago-čujuhus (17. p.)Karlson David. Marketing Your Consulting or Professional Services. New Delhi: Viva Books, 2004.
MLA-čujuhus (9. p.)Karlson David. Marketing Your Consulting or Professional Services. Viva Books, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.