Mayalagu G, Jaafar M, Kuok Choy L. Validity of Module Geographic Information System-Spatial Thinking Skills (GIS-STS). IJET [Internet]. 2018 Dec. 13 [cited 2024 May 3];7(4.34):427-30. Available from: https://sciencepubco.com/index.php/ijet/article/view/26902