Goddard, H. H. (1915). School training of defective children. World Book Co..
Lua i Stíl Chicago (17ú heag.)Goddard, Henry Herbert. School Training of Defective Children. Yonkers-on-Hudson, N.Y.: World Book Co., 1915.
Lua MLA (8ú heag.)Goddard, Henry Herbert. School Training of Defective Children. World Book Co., 1915.
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