Sihombing, Ismadi, Deyyanti Manullang, and Syafril Barus. “Radiografi Sinus Paranasal (SPN) Dengan Sangkaan Sinusitis Di Rumah Sakit Royal Prima Medan”. Jurnal Medika Radiologi 4, no. 1 (July 6, 2022): 17-21. Accessed December 3, 2023. http://jmr.jurnalsenior.com/index.php/jmr/article/view/31.