Abidi, Raza, et al. “KNOWLEDGE ATTITUDE & PRACTICE REGARDING HALITOSIS AMONG PATIENTS ATTENDING THE DENTAL OPD AT A PRIVATE DENTAL HOSPITAL IN KARACHI”. Pakistan Oral & Dental Journal, vol. 38, no. 2, Sept. 2018, pp. 245-9, https://podj.com.pk/index.php/podj/article/view/220.