MARPAUNG, Amalia; ZAINUDDIN, Zainuddin. IMPROVING STUDENTS™ ACHIEVEMENT IN VOCABULARY BY USING FLASHCARD. TRANSFORM : Journal of English Language Teaching and Learning, North Sumatera, Indonesia, v. 1, n. 2, 2012. DOI: 10.24114/tj.v1i2.733. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/jelt/article/view/733. Acesso em: 5 jul. 2025.