dwi joko priyono, “Percobaan Ekstrak Daun Sirih (Piper betle L.) sebagai Pengawet Kayu Sengon (Paraserianthes falcataria L.) Melalui Uji Kubur: Experiment of Betle (Piper betle L.) Leaf Extract as Sengon (Paraserianthes falcataria L.) Wood Preservative by Grave-Yard Test”, buletinloupe, vol. 18, no. 02, pp. 176–180, Dec. 2022.