SALSIJANTI , S. O. .; SUYADI; JUNINING, E. .; WIKE. Using Environmental Learning Models to Increase the Students’ Productive Skills. Nusantara Science and Technology Proceedings, Malang, Indonesia, p. 7-21, 2020. Disponível em: https://nstproceeding.com/index.php/nuscientech/article/view/295. Acesso em: 14 mar. 2025.