Widhani, Farisa D. P., Isniya Nosartika, Ira A. Kusuma, and Yoghi B. Prabowo. 2022. “Relationship Between Knowledge of Periodontal Disease and Gingival Melanin Pigmentation and Smoking Behavior”. E-GiGi 10 (1):24-31. https://doi.org/10.35790/eg.v10i1.37333.