Rehman Khan, Haseeb ur, et al. “Contextual Suggestion and Recommendation Systems: A Review on Challenges in User Modeling and Privacy Concern: Sistem Kontekstual Cadangan Dan Syor: Satu Tinjauan Terhadap Cabaran Dalam Pemodelan Pengguna Dan Masalah Privasi”.
Journal of ICT in Education, vol. 8, no. 1, Mar. 2021, pp. 43-60,
https://doi.org/10.37134/jictie.vol8.1.4.2021.