Guntarayana, Indria. “Analysis Determinant Sustainable Competitive Advantage Quality Product: (Study on Welding Workshop Business in Blitar Regency)”. Translitera : Jurnal Kajian Komunikasi dan Studi Media 12, no. 1 (March 31, 2023): 85-96. Accessed March 29, 2024. https://ejournal.unisbablitar.ac.id/index.php/translitera/article/view/2716.