Abu Bakar, Zainudin, and Darma Kabiru Rabiu. “The Development of Post Traumatic Stress Disorder Among Secondary School Students in Borno State Nigeria: A Systematic Review”. International Journal of Engineering & Technology, vol. 7, no. 4.9, Oct. 2018, pp. 32-38, https://doi.org/10.14419/ijet.v7i4.9.20611.