Mohd Tajudin N, Puteh M, Adnan M. Guiding Principles to Foster Higher Order Thinking Skills in Teaching and Learning of Mathematics. IJET [Internet]. 2018 Oct. 7 [cited 2024 May 5];7(4.15):195-9. Available from: https://www.sciencepubco.com/index.php/ijet/article/view/21445