R. Mustapha, M. A. Shahadan, R. K. Abdul Wahab Khan, I. Stephan, and M. Archer, “Students’ anxiety: An examination of the perception of facial threat and perceived paternal and maternal parenting style”, JRPPTTE, vol. 7, no. 2, pp. 19–32, Dec. 2017, doi: 10.37134/jrpptte.vol7.no2.3.2017.