Shahabuddin, S., and A. Anshary. “Uji Aktivitas Insektisida Ekstrak Daun Serai Terhadap Ulat Daun Kubis (Plutella Xylostella L.) Di Laboratorium”. Agroland: Jurnal Ilmu-Ilmu Pertanian, Vol. 17, no. 3, Dec. 2010, pp. 178 -3, http://jurnal.faperta.untad.ac.id/index.php/agrolandnasional/article/view/1174.