Sridhivya, D., K. Gurusamy, and E. Balamurali. “Utilizing ELSA Speak and Busuu Apps to Enhance English for Professional Purposes Among Indian Students: An Education 4.0 Approach”. Australian Journal of Applied Linguistics, vol. 7, no. 3, Oct. 2024, p. 1717, doi:10.29140/ajal.v7n3.1717.