O. M. R., M. R. A.R., A. S., A. M. N. N., M. R. I. S., and W. H. W.N.I., “Use of Adolescent Problems and Risk Behaviours Inventory (IPERI) to Predict the Influence of Personal Problems on Risky Behaviour among Adolescent in Sarawak, Malaysia”, JCSHD, vol. 4, no. 1, pp. 35-40, Nov. 2018.