F. Siswanto, Rahayu Apriliaswati, and Wardah, “Designing Transactional Conversation Videos as Supplementary Materials to Support Teaching English Speaking Skill: (A Design and Development Research to the Second Semester Students of EESP of Universitas Tanjungpura in Academic year 2021/2022)”, JSRET, vol. 2, no. 2, pp. 419–432, Apr. 2023.