"Archived copy". pabook.libraries.psu.edu. Archived from the original on 16 October 2013. Retrieved 3 February 2022.{{cite web}}: نگهداری یادکرد:عنوان آرشیو به جای عنوان (link)
Burns, Catherine M. "Walter Annenberg." In Immigrant Entrepreneurship: German-American Business Biographies, 1720 to the Present, vol. 5, edited by R. Daniel Wadhwani. German Historical Institute. Last modified January 07, 2015.
"Archived copy". pabook.libraries.psu.edu. Archived from the original on 16 October 2013. Retrieved 3 February 2022.{{cite web}}: نگهداری یادکرد:عنوان آرشیو به جای عنوان (link)