Journal Article
                        
                        Ball, Harriet A, Athula  Sumathipala, Sisira H Siribaddana, Yulia  Kovas, Nick  Glozier, Peter  McGuffin, and Matthew  Hotopf.  
"Genetic and environmental contributions to depression in Sri Lanka." The British Journal of Psychiatry 195, no. 6 (2009): 504-509.