Haddock, F. C. (1918). Power of will. Pelton Pub. Co.
Lua i Stíl Chicago (17ú heag.)Haddock, Frank Channing. Power of Will. Meriden, Conn: Pelton Pub. Co, 1918.
Lua MLA (9ú heag.)Haddock, Frank Channing. Power of Will. Pelton Pub. Co, 1918.
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