Eko Putro Setiawan, Kodrat, Sarwiji Suwandi, and Retno Winarni. “Eco-Critical Perspective in Tamasya Danau Toba Poetry by Sitor Situmorang”. International Proceedings of Nusantara Raya 1, no. 1 (October 20, 2022): 200–205. Accessed May 3, 2024. https://proceedings.uinsaizu.ac.id/index.php/nuraicon/article/view/128.