This document discusses why employee referral programs should be a company's top hiring source. It provides evidence that referrals result in higher quality hires who are more productive, have higher retention rates, and provide a high return on investment. Referrals also provide the highest volume of hires and applicants of the highest quality. The document outlines elements of top-performing referral programs, including prioritizing jobs, motivating employees through a team approach rather than monetary rewards, using proactive referral tools, and requiring specific information from referrers. It also discusses actions to increase referral volume, such as being responsive to referrals and focusing on attracting passive candidates.