Ong JW, Tajuddin AJA. Towards a Principled Use of L1 – Observing an EFL Teacher’s L1 Use in Rural Sabah, Malaysia. IJLTER [Internet]. 2020 Jun. 30 [cited 2026 May 2];19(6):206-22. Available from: https://ijlter.myres.net/index.php/ijlter/article/view/312