Elviana, Eva, and Erwin Djuni Winarto. “The Concept of Cultural Tourism Development of Sanggraloka Sekar Wilis in Ponorogo With A Vernacular Architectural Approach ”. Nusantara Science and Technology Proceedings (May 4, 2021): 139–145. Accessed July 30, 2025. https://nstproceeding.com/index.php/nuscientech/article/view/338.