Irawan, Arif Irawan, Illa Anggraeni Anggraeni, and Margaretta Christita Margaretta. 2015. “Identification Causes Leaf Spot Disease in Cempaka (Magnolia Elegans (Blume.) H.Keng) Seedling and Its Control Techniques”. Jurnal Wasian 2 (2): 87-94. https://doi.org/10.62142/mhayeq96.