Suryawati, S. ., Laili, W. N. ., & Murniyanto, E. . (2022). Effect of ZnSO4 Fertilizer Application on Growth and Essential Oil Content of Green Betel Plant (Piper betle L.). Nusantara Science and Technology Proceedings, 49-55. https://doi.org/10.11594/nstp.2022.2007