Prakash Singh,  Learners’ Violent Behaviour and Drug Abuse as Major Causes of Tobephobia in Schools.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2016, vol. 118(10). 3336 - 3340
    [viewed 13 November 2019]. Available from: https://publications.waset.org/pdf/10005473.