Ejere, HO; Alhassan, MB; Rabiu, M (18 Nisan 2012). "Face washing promotion for preventing active trachoma". The Cochrane database of systematic reviews. Cilt 4. ss. CD003659. doi:10.1002/14651858.CD003659.pub3. PMID22513915.
Ejere, HO; Alhassan, MB; Rabiu, M (18 Nisan 2012). "Face washing promotion for preventing active trachoma". The Cochrane database of systematic reviews. Cilt 4. ss. CD003659. doi:10.1002/14651858.CD003659.pub3. PMID22513915.