Vernon, M. D. (1971). Reading and its difficulties: A psychological study. C.U.pr..
Chicago-viite (17. p.)Vernon, M. D. Reading and Its Difficulties: A Psychological Study. Cambridge: C.U.pr., 1971.
MLA-viite (9. p.)Vernon, M. D. Reading and Its Difficulties: A Psychological Study. C.U.pr., 1971.
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