Sari SM, Nasution RE, Meidipa LF. An Analysis of Indefinite Pronouns Proficiency in English Sentences Among Seventh Grade Students at Madrasah Tsanawiah Yayasan Pendidikan Karya Setia (MTS YPKS) Padangsidimpuan. Journal ETANIC [Internet]. 2023 Aug. 28 [cited 2024 Nov. 21];1(2). Available from: https://jurnal.radisi.or.id/index.php/JournalETANIC/article/view/377