PURBA, Member Reni; TARIGAN, Gabriel C.J.; LOKANATA, Shieny. The effectiveness of natural tooth whitening using herbal substances on coffee-induced tooth discoloration. Buletin Kedokteran & Kesehatan Prima, [S. l.], v. 4, n. 1, p. 177–182, 2025. DOI: 10.34012/bkkp.v4i1.6793. Disponível em: http://139.162.50.187/index.php/bulkesprima/article/view/6793. Acesso em: 3 apr. 2026.