Faisal Sultan, Muhammad, et al. “Issues and Challenges in Managing Catering and Food Retail Business in Karachi: Study of Tikka Inn Caterers”. International Journal of Experiential Learning & Case Studies, vol. 4, no. 1, June 2019, pp. 28-44, https://journals.iobm.edu.pk/index.php/ijelcs/article/view/300.