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Gaya APA

Porter, M, E. (1985). Keunggulan Bersaing : Menciptakan & Mempertahankan Kinerja Unggul . Erlangga: Jakarta.

Gaya MLA

Porter, Michael, E.. "Keunggulan Bersaing : Menciptakan & Mempertahankan Kinerja Unggul". Erlangga: Jakarta, 1985. Text.