Pyle, H. (1957). Otto of the Silver Hand. Charles Scribner's.
Lua i Stíl Chicago (17ú heag.)Pyle, Howard. Otto of the Silver Hand. New York: Charles Scribner's, 1957.
Lua MLA (9ú heag.)Pyle, Howard. Otto of the Silver Hand. Charles Scribner's, 1957.
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