Open Science Research Excellence
R. M. Kashim,  The Conceptual and Procedural Knowledge of Rational Numbers in Primary School Teachers.   journal   = {International Journal of Social, Behavioral, Educational, Economic, Business and Industrial Engineering}, [online]. World Academy of Science, Engineering and Technology. March 2016, vol. 111(3). 933 - 937[viewed 22 March 2019]. Available from: http://waset.org/publications/10004143.