PARDEDE , B. H. .; TAMPUBOLON , S. .; LESTARI , F. D. . The Effect of Using Group Chat Discussion on Whatsapp Into Students’ Vocabulary Mastery Seventh Grade at SMP St Yoseph Medan. Jurnal Pendidikan dan Konseling (JPDK), [S. l.], v. 4, n. 6, p. 12386–12395, 2022. DOI: 10.31004/jpdk.v4i6.10460. Disponível em: http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/10460. Acesso em: 29 jun. 2024.