APA (7th ed.) Zitazioa
Peterson, B. B. (2009). Franklin Delano Roosevelt, preserver of spirit & hope. Nova Science Publishers.
Chicago Style (17th ed.) Zitazioa
Peterson, Barbara Bennett. Franklin Delano Roosevelt, Preserver of Spirit & Hope. New York: Nova Science Publishers, 2009.
MLA (9th ed.) Zitazioa
Peterson, Barbara Bennett. Franklin Delano Roosevelt, Preserver of Spirit & Hope. Nova Science Publishers, 2009.
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