Herbert, R. K. (1986). Language universals, markedness theory, and natural phonetic processes. Mouton de Gruyter.
Čikaški stil citiranja (17. izdanje)Herbert, Robert K. Language Universals, Markedness Theory, and Natural Phonetic Processes. Berlin: Mouton de Gruyter, 1986.
MLA način citiranja (9. izdanje)Herbert, Robert K. Language Universals, Markedness Theory, and Natural Phonetic Processes. Mouton de Gruyter, 1986.
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