Faris S, Sagala LG, Wijaya E, Albert A, Hassim AA. The Impact of Green Knowledge and Servant Leadership on Green Innovation through Green Self-Efficacy in Toba Caldera Geopark. MABIS [Internet]. 2025Aug.26 [cited 2025Sep.1];16(2):480-507. Available from: https://journal.umy.ac.id/index.php/mb/article/view/27847