1. 1) L. Hinton, J. Nichols and J. J. Ohala, (Eds.), Sound Symbolism (Cambridge University Press, Cambridge, 2006).
2. 2) F. D. Saussure, Course in General Linguistics (W. Baskin, Trans.) (Philosophical Library, New York, 1959).
3. 3) W. Köhler, Gestalt Psychology: An Introduction to New Concepts in Modern Psychology (WW Norton & Company, New York, 1970).
4. 4) S. S. Newman, ``Further experiments in phonetic symbolism,'' J. Psychol. Am., 45, 53-75 (1933).
5. 5) E. Sapir, ``A study in phonetic symbolism,'' J. Exp. Psychol., 12, 225-239 (1929).