* Niebuhr, Reinhold. "Leaves from the Notebook of a Tamed Cynic'' (1929), a diary
* Niebuhr, Reinhold. "Leaves from the Notebook of a Tamed Cynic'' (1929), a diary
* Niebuhr, Reinhold. ''Remembering Reinhold Niebuhr'' (1991), his letters, edited by his wife, Ursula Niebuhr.
* Niebuhr, Reinhold. ''Remembering Reinhold Niebuhr'' (1991), his letters, edited by his wife, Ursula Niebuhr.
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* Niebuhr, Reinhold. "The Public Theology of Reinhold Niebuhr" (radio interviews [http://speakingoffaith.publicradio.org/programs/niebuhr-rediscovered/particulars.shtml online])