Patton, D. H. (1951). Word mastery speller. C.E. Merrill Co..
Lua i Stíl Chicago (17ú heag.)Patton, David H. Word Mastery Speller. Columbus, Ohio: C.E. Merrill Co., 1951.
Lua MLA (8ú heag.)Patton, David H. Word Mastery Speller. C.E. Merrill Co., 1951.
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