Ismail, R. et al. 2018. Kos Ketidakberadaan Guru Dalam Bilik Darjah: Kajian Kes di Daerah Muallim, Perak: Cost of teachers’ absenteeism in the classroom: A case study in Muallim District, Perak. Management Research Journal. 7, (Dec. 2018), 75–85. DOI:https://doi.org/10.37134/mrj.vol7.7.2018.