S. IRBAYUNI; L. SUSILOWATI. Making Ketchup Products to Build the Entrepreneurship Soul of the Putat Jaya Village, Sawahan District, Surabaya. Nusantara Science and Technology Proceedings, Malang, Indonesia, p. 401-403, 2019. Disponível em: https://nstproceeding.com/index.php/nuscientech/article/view/128. Acesso em: 14 mar. 2025.