LEHMANN, W. P. (1996). Theoretical bases of Indo-European linguistics. Routledge.
Lua i Stíl Chicago (17ú heag.)LEHMANN, Winfred P. Theoretical Bases of Indo-European Linguistics. London: Routledge, 1996.
Lua MLA (9ú heag.)LEHMANN, Winfred P. Theoretical Bases of Indo-European Linguistics. Routledge, 1996.
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