Putri, V. E. and Ikaningtyas, M. (2026) “The Influence of Transformational Leadership Style and Internal Communication on Employee Engagement at Haivo Group, Surabaya”, Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 9(2), pp. 17241-17251. doi: 10.31538/iijse.v9i2.11123.