Mustapha, R., 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”. Journal of Research, Policy & Practice of Teachers and Teacher Education, vol. 7, no. 2, Dec. 2017, pp. 19-32, doi:10.37134/jrpptte.vol7.no2.3.2017.