Habib Anugerah Alkarim, Angela Surya Ginting, Dona Aisyah Sitorus, Naylatul Fadhilah Ginting, Munawarah br. Limbong, Deasy Yunita Siregar. Understanding Formal and Informal English: A Literature Review. Jejak digital. 2025;2(1):1257-1262. doi:10.63822/zx384669