Birmingham City F.C. - Wikipedia

Cardiff City F.C. - Wikipedia

Leicester City F.C. - Wikipedia

Newcastle United F.C., FIFA Football Gaming wiki

Fulham F.C., FIFA Football Gaming wiki

Soccer crests: Explaining the meaning behind Man United's, more - Sports Illustrated

Cardiff Encyclopedia MDPI

2008-07-24: Cardiff City 1-0 Celtic, Algarve Challenge Cup, Faro – Pictures – The Celtic Wiki

Liverpool F.C. - Pro Evolution Soccer Wiki - Neoseeker

Caernarfon Town F.C. - Wikipedia

1999-08-12: Cwmbran Town 0-6 Celtic, UEFA Cup Qualifier – The Celtic Wiki