Fred Maidment. (1997). International business 97/98. Dushkin Pub. Group.
Lua i Stíl Chicago (17ú heag.)Fred Maidment. International Business 97/98. Guilford, Conn.: Dushkin Pub. Group, 1997.
Lua MLA (8ú heag.)Fred Maidment. International Business 97/98. Dushkin Pub. Group, 1997.
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