Basiroh, Basiroh, and Wiji Lestari. “ANALYSIS OF PLANT FRAGARIA XANANASSA DISEASE DIAGNOSES USING PRODUCTION RULES BASE ON EXPERT SYSTEM”. Jurnal Pilar Nusa Mandiri 16, no. 1 (March 2, 2020): 25-32. Accessed April 18, 2021. http://ejournal.nusamandiri.ac.id/index.php/pilar/article/view/1174.