Kleber, D. M. S., & Volkova, T. (2018). Key Success Factors to Increase Value Proposition in the Hospitality Industry: Faktor Kunci Sukses untuk Meningkatkan Proposisi Nilai di Industri Perhotelan. PROZIMA (Productivity, Optimization and Manufacturing System Engineering), 2(1), 34–38. https://doi.org/10.21070/prozima.v2i1.2203