Mufida, Irmayanti, Gusti Nur Hafifah, dan Linda Mayasari. “The Implementation of Discovery Learning to Teach Speaking at the First Grade Students at SMP Institut Indonesia”. Tell : Teaching of English Language and Literature Journal 3, no. 2 (November 12, 2018): 108–114. Diakses Mei 19, 2024. https://journal.um-surabaya.ac.id/Tell/article/view/2157.