References
- Jakobson R., Halle M. Fundamentals of Language. Mouton, S-Gravenhage 1956
- Johnson W., Darley F., Spriestersbach D. Diagnostic Methods in Speech Pathology. Harper & Row, New York 1959
- McCarthy D. A. The Language Development of the Pre-School Child. University of Minnesota Press. 1930
- Penfield W., Roberts L. Speech and Brain Mechanisms. Princeton University Press. 1959
- Templin M. C. Certain Language Skills in Children. University of Minnesota Press. 1957