Joseph Glenn, Austero, Bertumen, Marella Francesca, and Botor, Helen Louise. “Operational Efficiency of Dong Valenz View Deck Cafe”. GPH-International Journal of Business Management 8, no. 01 (January 25, 2025): 537-559. Accessed October 1, 2025. https://gphjournal.org/index.php/bm/article/view/1745.