Telaumbanua, Y. A. .; Harefa, S. T. H. .; Zebua, M. R.; Zega, S. M.; Zalukhu, J.; Mendrofa, R. Comparison of the Effectiveness of Duolingo and Cake Applications in Improving Students’ English Language Proficiency. Jur. Penel. Inov. 2024, 4, 2395-2400.