A. I. Irawan, I. A. Anggraeni, and M. C. Margaretta, “Identification Causes Leaf Spot Disease in Cempaka (Magnolia elegans (Blume.) H.Keng) Seedling and Its Control Techniques”, wasian, vol. 2, no. 2, pp. 87–94, Dec. 2015, doi: 10.62142/mhayeq96.