Aki, Agustinus, Mister Maru, and Elisabeth Oroh. “The Content Analysis of English Textbooks Based on Alan Cunningsworth’s Criteria: A Systematic Review”. Edumaspul: Jurnal Pendidikan 8, no. 1 (March 1, 2024): 408-429. Accessed December 9, 2025. https://jurnal.unimen.cloud/maspuljr/article/view/7661.