Wise, S. S. (1949). Challenging Years: The autobiography of Stephen Wise. Putnam.
Lua i Stíl Chicago (17ú heag.)Wise, Stephen S. Challenging Years: The Autobiography of Stephen Wise. New York: Putnam, 1949.
Lua MLA (8ú heag.)Wise, Stephen S. Challenging Years: The Autobiography of Stephen Wise. Putnam, 1949.
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