Hutahayan, Arta Junita. “Identification of Distribution the Pineapple Mealybug Wilt Disease in the Pineapple Plant in North Tapanuli.” International Journal of Environment, Agriculture and Biotechnology, vol. 2, no. 5, 2017, pp. 2473–80. Crossref, https://doi.org/10.22161/ijeab/2.5.26.