https://www.joodsmonument.nl/nl/page/27393/samuel-juda-vredenburg`
https://www.dutchjewry.org/genealogy/souget/64.shtml`
https://www.oorlogsbronnen.nl/tijdlijn/Samuel-Juda-Vredenburg/01/77376
https://archief.amsterdam/indexen/deeds/985333fb-1af2-56a3-e053-b784100ade19?person=985333fb-1af3-56a3-e053-b784100ade19
https://www.maxvandam.info/humo-gen/family/1/F3641?main_person=I8645