Analysis of information sources in references of the Wikipedia article "Hugo Zwillenberg" in English language version.
Unlike most department stores in Germany, the Tietz firm is still a family enterprise, and is conducted at present by Georg and Martin Tietz, the sons of Oscar Tietz, and by his son-in-law, Dr. Hugo-Zwillenberg.
{{cite web}}
: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link)