Links
| The White Rosettes | www.whiterosettes.org.uk |
| The Jazz Firm | www.whiterosettes.org.uk/jazzfirm |
| LABBS | www.labbs.org.uk |
| LABBS Youth Chorus (Ivy Leagues) | www.labbsyouthchorus.co.uk |
| BABS | www.singbarbershop.com |
| National Barbershop Youth Chorus | www.nb-yc.co.uk |
| Barbershop Harmony Society | http://www.barbershop.org |
| IABS | http://geocities.com/irishbarbershop/ |
| Pitch Invasion | www.pitchinvasion.biz |
| Grand Central Chorus | www.grand-central-chorus.com |
| Calder Valley BHC | www.spiritofharmony.org.uk |
| Evolution | www.evolutionacappella.com |
| O C Times - 2007 International 2nd Place quartet | www.octimesquartet.com |