-Yang Lee, C., H. -Heng Yap, and N.-. Long Chong. “Insecticide Toxicity on the Adult German ceki’oach, Blattella Germanica (L.) (Dictyoptera: Blattellidae)”. Malaysian Journal of Science, vol. 17, no. 1, Apr. 1996, pp. 1-9, https://ejournal.um.edu.my/index.php/MJS/article/view/9400.