Poetry Oktanauli, Azyyati Patricia Zikir, Pinka Taher, Margaretha Herawati, and Martin Sean. 2023. “Effect of Robusta Coffee (Coffea Canephora) on the Degree of Acidity (pH) of Saliva”. International Journal of Clinical Science and Medical Research 3 (5):97-101. https://doi.org/10.55677/IJCSMR/V3I5-02/2023.