Sihombing, Ismadi, Deyyanti Manullang, and Syafril Barus. 2022. “Radiografi Sinus Paranasal (SPN) Dengan Sangkaan Sinusitis Di Rumah Sakit Royal Prima Medan”. Jurnal Medika Radiologi 4 (1), 17-21. http://jmr.jurnalsenior.com/index.php/jmr/article/view/31.