Tolong jelaskan mengenai Sumber dari Naftali Zvi Yehuda Berlin

Epstein, B.. Mekor Baruch. Sections translated as: My Uncle the Netziv by Rabbi M. Dombey. Brooklyn, New York: Mesorah publications ltd.

Gil S. Perl (2012). The Pillar of Volozhin: Rabbi Naftali Ẓvi Yehuda Berlin and the world of nineteenth-century Lithuanian Torah scholarship. Brighton, Mass.: Academic Studies Press.