Martinez, Juniora Blessie Ann N. “Profitability of Robusta Coffee (Coffea Canephora L.) at Farm Level in Quirino, Philippines”. International Journal of Multidisciplinary: Applied Business and Education Research, vol. 4, no. 7, July 2023, pp. 2558-65, https://doi.org/10.11594/ijmaber.04.07.32.