RHEINHOLZ, C. Gustav Amsinck: Ein Hamburger Großkaufmann in New York. [s.l.] : Hamburg University Press,2011. v. Band 11 DOI: 10.15460/HUP.MFW.11.116. Disponível em: https://hup.sub.uni-hamburg.de/oa-pub/catalog/book/162. Acesso em: 31 jan. 2023.