The Economist, and Nancy Garrison Jenn. Headhunters and How to Use Them: A Guide for Organisations and Individuals. London, England : Profile Books. [1]
kornferry.com
ir.kornferry.com
"Korn Ferry Form 10-K"(PDF). ir.kornferry.com. Diakses tanggal 2021-01-27.Parameter |url-status= yang tidak diketahui akan diabaikan (bantuan)
mwmconsulting.com
"About us". MWM Consulting (dalam bahasa Inggris). Diakses tanggal 2020-02-24.
Richtel, Matt (8 June 1998). "A New Executive-Recruiting Service on the Web". New York Times (Business/Financial Desk). New York, N.Y., United States. hlm. D6. Diakses tanggal 9 December 2016.
Hilder, David B. (16 July 1987). "Headhunter Gets Recruited for U.N. Post" (Eastern edition). New York, N.Y., United States: Wall Street Journal. hlm. N/A. Diakses tanggal 8 December 2016.
Tkacik, Maureen (21 August 2001). "Korn/Ferry to Slash Work Force By 20% in New Round of Job" (dalam bahasa Inggris) (Eastern edition). New York, N.Y., United States: Wall Street Journal. Dow Jones & Company Inc. hlm. A4. Diakses tanggal 12 December 2016.
Weber, Lauren (9 December 2014). "Here's What Boards Want in Executives" (dalam bahasa Inggris) (Eastern edition). New York, N.Y., United States: Wall Street Journal. hlm. B5. Diakses tanggal 20 December 2016.