Vernon, M. D. (1971). Reading and its difficulties: A psychological study. C.U.pr..
Chicago-čujuhus (17. p.)Vernon, M. D. Reading and Its Difficulties: A Psychological Study. Cambridge: C.U.pr., 1971.
MLA-čujuhus (9. p.)Vernon, M. D. Reading and Its Difficulties: A Psychological Study. C.U.pr., 1971.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.