PRASTIANTO, Hendro R. Imperfect Aspect in English and Indonesian Verbs. Nusantara of Research : Jurnal Hasil-hasil Penelitian Universitas Nusantara PGRI Kediri, Indonesia, INA, v. 2, n. 1, 2015. DOI: 10.29407/nor.v2i1.80. Disponível em: https://ojs.unpkediri.ac.id/index.php/efektor/article/view/80. Acesso em: 8 jun. 2025.