Suheriyanto, Dwi, et al. “Effects of Season on Abundance and Diversity of Soil Arthropods in Mangli Coffee Plantation Kediri Regency, East Java, Indonesia”. International Journal of Engineering & Technology, vol. 8, no. 1.9, Jan. 2019, pp. 131-5, https://doi.org/10.14419/ijet.v8i1.9.26385.