Irawan, A.I. et al. 2015. Identification Causes Leaf Spot Disease in Cempaka (Magnolia elegans (Blume.) H.Keng) Seedling and Its Control Techniques. Jurnal Wasian. 2, 2 (Dec. 2015), 87–94. DOI:https://doi.org/10.62142/mhayeq96.