AL MOUSA, Heyam Abdulrahman. RETRACTRED ARTICLE: Impact of employee efforts and expertise on customer surprise, delight and customer percent of budget spent: moderating role of shopping frequency. Nexo Revista Científica, [S. l.], v. 36, n. 04, p. 653–666, 2023. DOI: 10.5377/nexo.v36i04.16791. Disponível em: https://www.camjol.info/index.php/NEXO/article/view/16791. Acesso em: 3 apr. 2026.