Harrell, K. (2007). Connect: Building success through people, purpose and performance. Harper Collins.
Chicago-referens (17:e uppl.)Harrell, Keith. Connect: Building Success Through People, Purpose and Performance. New York: Harper Collins, 2007.
MLA-referens (9:e uppl.)Harrell, Keith. Connect: Building Success Through People, Purpose and Performance. Harper Collins, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.