S. ISHAK, A. R. C. OMAR, K. ARIFFIN, and M. Y. HUSAIN, “Do the ‘apples’ bad? An exploratory study on students moral cognitive ability”, Int J Innov Educ Res, vol. 2, no. 3, pp. 115–125, Mar. 2014, doi: 10.31686/ijier.vol2.iss3.160.