Nawangsih N. Innovation of Product Competitiveness of Warung Angkringan Based On Ethnographic Perspective. adv [Internet]. 2023 Jun. 26 [cited 2025 Jun. 24];7(1):89-96. Available from: https://ejournal.itbwigalumajang.ac.id/index.php/adv/article/view/1055