Ramadhan, D. A., Sarjani, T. M., & Suwardi, A. B. (2024). Inventory of orchids plants (Orchidaceae) in the Tangkahan area, Langkat Regency, North Sumatra. Jurnal Biologi Tropis, 24(2b), 267–273. https://doi.org/10.29303/jbt.v24i1b.8051