Rivandani, Irma, dan Dian Hartatie. “Perbanyakan Vegetatif Tanaman Kopi Robusta (Coffea Canephora) Berbagai Macam Klon Terhadap Keberhasilan Sambung Dini”. Agropross : National Conference Proceedings of Agriculture 3 (September 20, 2019): 153–161. Diakses Juli 3, 2024. https://proceedings.polije.ac.id/index.php/agropross/article/view/527.