Read, W. P. (1961). Knowledge and goodness. Extension Division, University of Utah.
Lua i Stíl Chicago (17ú heag.)Read, Waldemer P. Knowledge and Goodness. Salt Lake City: Extension Division, University of Utah, 1961.
Lua MLA (8ú heag.)Read, Waldemer P. Knowledge and Goodness. Extension Division, University of Utah, 1961.
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