Markham, C. (2006). The top consultant (4th.). Kogan page.
Lua i Stíl Chicago (17ú heag.)Markham, Calvert. The Top Consultant. 4th. New Delhi: Kogan page, 2006.
Lua MLA (9ú heag.)Markham, Calvert. The Top Consultant. 4th. Kogan page, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.