PUTRA KAMAYANA, I Gusti Nyoman. RESEARCHING THE -ING FORMS IN ENGLISH. LITERA : Jurnal Bahasa Dan Sastra, [S. l.], v. 3, n. 1, 2017. DOI: 10.36002/litera.v3i1.284. Disponível em: https://jurnal.undhirabali.ac.id/index.php/litera/article/view/284. Acesso em: 7 may. 2025.