Tezara, C., J. Siregar, H. Lim, F. Fauzi, M. Yazdi, I. Moey, and J. Lim. “Factors That Affect the Mechanical Properties of Kenaf Fiber Reinforced Polymer: A Review”. Journal of Mechanical Engineering and Sciences, vol. 10, no. 2, Sept. 2016, pp. 2159-75, doi:10.15282/jmes.10.2.2016.19.0203.