Davis, K. Business And Its Environmental Keith Davis Dan Robert L. Blomstrom. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Davis, Keith. Business And Its Environmental Keith Davis Dan Robert L. Blomstrom. McGraw-Hill.
Lua MLA (8ú heag.)Davis, Keith. Business And Its Environmental Keith Davis Dan Robert L. Blomstrom. McGraw-Hill.
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