Clark, C. (1934). The flags of Britain: Their origin and history / by Cumberland Clark. Wilding & Son Ltd..
Lua i Stíl Chicago (17ú heag.)Clark, Cumberland. The Flags of Britain: Their Origin and History / by Cumberland Clark. Shrewsbury: Wilding & Son Ltd., 1934.
Lua MLA (8ú heag.)Clark, Cumberland. The Flags of Britain: Their Origin and History / by Cumberland Clark. Wilding & Son Ltd., 1934.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.