Faris, S., Sagala, L. G., Wijaya, E., Albert, A., & Hassim, A. A. (2025). The Impact of Green Knowledge and Servant Leadership on Green Innovation through Green Self-Efficacy in Toba Caldera Geopark. Jurnal Manajemen Bisnis, 16(2), 480–507. https://doi.org/10.18196/mb.v16i2.27847