Haarmann, H. (1986). Language in ethnicity: A view of basic ecological relations. Mouton de Gruyter.
Chicago-viite (17. p.)Haarmann, Harald. Language in Ethnicity: A View of Basic Ecological Relations. Berlin ; New York: Mouton de Gruyter, 1986.
MLA-viite (9. p.)Haarmann, Harald. Language in Ethnicity: A View of Basic Ecological Relations. Mouton de Gruyter, 1986.
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