Lewis, H. (2004). Consultants and advisers. Kogan Page.
Chicago-čujuhus (17. p.)Lewis, Harold. Consultants and Advisers. New Delhi: Kogan Page, 2004.
MLA-čujuhus (9. p.)Lewis, Harold. Consultants and Advisers. Kogan Page, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.