International Dental Hygiene Educators' Forum, 07 Nov 2018 https://bmcoralhealth.biomedcentral.com/articles/10.1186/s12903-018-0647-7
International Federation of Dental Hygienists, 07 Nov 2018 https://bmcoralhealth.biomedcentral.com/articles/10.1186/s12903-018-0647-7