Hamidah, M. “A Multimodal Analysis of English Textbook for Vocational High School: A Study of English For Specific Purposes”. The Proceedings of English Language Teaching, Literature, and Translation (ELTLT), vol. 11, no. 1, Dec. 2022, pp. 150-8, https://proceeding.unnes.ac.id/eltlt/article/view/1662.