Culpin, I, Stapinski, L A, Miles, O, Araya, R & Joinson, C J 2015, ' Exposure to socioeconomic adversity in early life and risk of depression at 18 years : The mediating role of locus of control ', Journal of Affective Disorders, vol. 183, pp. 269-278 . https://doi.org/10.1016/j.jad.2015.05.030