Rohman, Saefur, and Nova Triani. 2023. “Socialization on the Preparation of Natural Plant Growth Regulator to an Organic Farming Community in Lengkong Village, Ponorogo Regency”. Nusantara Science and Technology Proceedings 2023 (33). Malang, Indonesia:416-20. https://doi.org/10.11594/nstp.2023.3366.