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Liyani, Annisa April (2022) The Effect of Product Utilitarian on Switching of Premium to Pertalite Products in Bengkalis. Undergraduate thesis, Politeknik Negeri Bengkalis.
Liyani, Annisa April (2022) PT. Ekasapta Paramita Energi Buton Stockpile. [Experiment] (Unpublished)