Lua APA (7ú heag.)

Bell, A. H. (1992). Business communication towards 2000. South-Western.

Lua i Stíl Chicago (17ú heag.)

Bell, Arthur H. Business Communication Towards 2000. Ohio: South-Western, 1992.

Lua MLA (9ú heag.)

Bell, Arthur H. Business Communication Towards 2000. South-Western, 1992.

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