Haarmann, H. (1986). Language in ethnicity: A view of basic ecological relations. Mouton de Gruyter.
Lua i Stíl Chicago (17ú heag.)Haarmann, Harald. Language in Ethnicity: A View of Basic Ecological Relations. Berlin ; New York: Mouton de Gruyter, 1986.
Lua MLA (9ú heag.)Haarmann, Harald. Language in Ethnicity: A View of Basic Ecological Relations. Mouton de Gruyter, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.