Nuzula, Firdausi, et al. “Application Modelling Techniques to Improve Year 7 Pupils’ Ability to Write Formal Personal Letters”. Wacana : Jurnal Bahasa, Seni, Dan Pengajaran, vol. 10, no. 2, Oct. 2026, pp. 142-54, https://doi.org/10.29407/jbsp.v10i2.29489.