Lewis, H. (2004). Consultants and advisers. Kogan Page.
Chicago Style (17th ed.) CitationLewis, Harold. Consultants and Advisers. New Delhi: Kogan Page, 2004.
MLA (9th ed.) CitationLewis, Harold. Consultants and Advisers. Kogan Page, 2004.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.