Dewi, N. R., I. Hartoyo, and C. H. Natalia. “Integrating the Case Method Approach in 21st Century Teaching: Empowering the Development of Effective and Innovative Teaching Instruments”. JOALL (Journal of Applied Linguistics and Literature), vol. 9, no. 1, Apr. 2024, pp. 222-40, doi:10.33369/joall.v9i1.30061.