1. M. Glick, M. S. Greenberg, P. B. Lockhart, and S. J. Challacomb, Burket’s Oral Medicine 13th ed (Willey Blackwell, New Jersey, 2021), pp. 73–77.
2. B. W. Neville, D. D. Damm, C. M. Allen, and A. C. Chi, Oral and Maxillofacial Pathology 4th ed. (Saunders, Elsevier, Missouri, 2015), pp. 285–288.
3. Tim Riskesdas 2018, Laporan Nasional Riskesdas 2018 (Badan Penelitian dan Pengembangan Kesehatan, Jakarta, 2018), pp. 218.
4. C. Scully, S. Flint, S. R. Porter, K. Moos, and J. Bagan, Oral and Maxillofacial Diseases 4th ed. (Infroma Healthcare, London, 2010), pp. 292–293.
5. Odell, E. W. Cawson’s Essentials of Oral Pathology and Oral Medicine 9th ed. (Elsevier, London, 2017), pp. 192–195.