M. Siregar, V. C. E. Tarigan, Z. P. Nasution, M. Z. Hanie, D. Adryansyah, and D. Yulida, “Geoeducation for Schoolchildren in Geopark Areas: Enhancing Awareness in Toba Caldera and Kenyir Geoparks”, mah, vol. 4, no. 02, pp. 182–191, Aug. 2025.