Harrell, K. (2007). Connect: Building success through people, purpose and performance. Harper Collins.
Lua i Stíl Chicago (17ú heag.)Harrell, Keith. Connect: Building Success Through People, Purpose and Performance. New York: Harper Collins, 2007.
Lua MLA (9ú heag.)Harrell, Keith. Connect: Building Success Through People, Purpose and Performance. Harper Collins, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.