HAJAR. Peningkatan Kemampuan Memahami Struktur Kalimat If Condtioanal Bahasa Inggris Melalui Penerapan Model Pembelajaran Kooperatif Tipe Greeting and Sending Problems . Jurnal Kinerja Kependidikan (JKK): Facilities of Educator Career and Educational Scientific Information, [S. l.], v. 1, n. 1, p. 31–44, 2021. DOI: 10.32672/jkk.v1i1.30. Disponível em: https://www.journalserambi.org/index.php/jkk/article/view/30. Acesso em: 2 oct. 2025.