Mettachit Nawachinda. n.d. The curvature of the palatal root canal of the maxillary molars in the Thai population. S.l.:s.n.;
Mettachit Nawachinda. (n.d.) The curvature of the palatal root canal of the maxillary molars in the Thai population (รายงานผลงานวิจัย). s.n.:S.l.
Mettachit Nawachinda. The curvature of the palatal root canal of the maxillary molars in the Thai population. S.l.:s.n., n.d.
Mettachit Nawachinda. (n.d.) The curvature of the palatal root canal of the maxillary molars in the Thai population (รายงานผลงานวิจัย). s.n.:S.l.