ANSHORI, Mohamad Yusak. Improving The Restaurant Product Sale: A Case Study at a Hotel in Surabaya. International Research Journal of Business Studies, Jakarta, Indonesia, v. 5, n. 3, p. 64–73, 2012. DOI: 10.21632/irjbs.5.3.64-73. Disponível em: https://irjbs.prasetiyamulya.ac.id/index.php/jurnalirjbs/article/view/815. Acesso em: 4 dec. 2025.