archINFORM, archINFORM project ID 9313, besøkt 31. juli 2018[Hentet fra Wikidata]
iwm.org.uk
«War Memorials Register: Norwegian Resistance WW2». Imperial War Museums(engelsk). Besøkt 3. november 2023. «Commemoration: Second World War (1939-1945) | Maker: Ragnhild Butenschon | Ceremony: Unveiled | Date: 25 March 1966 | Attended by: King Olav V of Norway (---) Current location: North Chapel. | St Mary le Bow Church | Cheapside | City of London»