VILJOEN, J. (1994). Strategic Management Planning And Implementing Succesful Corporate Strategies John Viljoen. Longman Business & Professiona.
Lua i Stíl Chicago (17ú heag.)VILJOEN, John. Strategic Management Planning And Implementing Succesful Corporate Strategies John Viljoen. Longman Business & Professiona, 1994.
Lua MLA (8ú heag.)VILJOEN, John. Strategic Management Planning And Implementing Succesful Corporate Strategies John Viljoen. Longman Business & Professiona, 1994.
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