Mohamad Saad, Mohamad Salahudin, et al. “’Portable Sprinkler’ Bagi Penyemburan Baja Dan Racun Serangga Di Kawasan Sawah”. Politeknik & Kolej Komuniti Journal of Engineering and Technology, vol. 4, no. Special Issue, Jan. 2019, pp. 159-71, https://app.mypolycc.edu.my/journal/PMJET/article/view/637.