Daniel, N. (1975). The cultural barrier: Problems in the exchange of ideas. University Press.
Lua i Stíl Chicago (17ú heag.)Daniel, Norman. The Cultural Barrier: Problems in the Exchange of Ideas. Edinburgh: University Press, 1975.
Lua MLA (8ú heag.)Daniel, Norman. The Cultural Barrier: Problems in the Exchange of Ideas. University Press, 1975.
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