Não informado. (1972). School psychology digest. National Association of School Psychologists.
Chicago-referens (17:e uppl.)Não informado. School Psychology Digest. Cuyahoga Falls, Ohio: National Association of School Psychologists, 1972.
MLA-referens (8:e uppl.)Não informado. School Psychology Digest. National Association of School Psychologists, 1972.
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