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Purnama, Seri (2024) An Analysis The Effectiveness of Csr Program in Improving Corporate Image PT. Pertamina Kpi Ru Ii Sungai Pakning. Undergraduate thesis, Politeknik Negeri Bengkalis.
Purnama, Seri (2024) PT. Dipo Internasional Pahala Otomotif. [Experiment] (Unpublished)