An Analysis of English Speaking Materials in the Textbook “Bahasa Inggris SMA” Based on Dat Bao’s Theory at the Eleventh Grade of SMA Swasta Santu Xaverius Gunungsitoli 2022 2023. edukasia 2023, 4 (2), 1471-1484. https://doi.org/10.62775/edukasia.v4i2.466.