Janjang Subekti, Purwanto, and Sri Rahayu, “The Effect of Leadership Style and Mental Competency Guidance on Employee Performance with Work Engagement as a Mediating Variable at the Medium Customs Type, Customs and Excise Controlling and Servicing Office of Juanda”, IJoMS, vol. 5, no. 1, pp. 1086–1097, Jun. 2026.