Wiskind-Elper, O. (2010). Wisdom of the heart: The teachings of Rabbi Yaʻakov of Izbica-Radzyn. Jewish Publication Society.
Chicago-referens (17:e uppl.)Wiskind-Elper, Ora. Wisdom of the Heart: The Teachings of Rabbi Yaʻakov of Izbica-Radzyn. Philadelphia: Jewish Publication Society, 2010.
MLA-referens (9:e uppl.)Wiskind-Elper, Ora. Wisdom of the Heart: The Teachings of Rabbi Yaʻakov of Izbica-Radzyn. Jewish Publication Society, 2010.
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