Não informado. (1991). Business & the contemporary world. Walter de Gruyter.
Lua i Stíl Chicago (17ú heag.)Não informado. Business & the Contemporary World. Hawthorne, NY: Walter de Gruyter, 1991.
Lua MLA (8ú heag.)Não informado. Business & the Contemporary World. Walter de Gruyter, 1991.
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