McCrory, C., J. Williams, A. Murray, A. Quail and M. Thornton (2013). Growing Up in Ireland: Design, Instrumentation and Procedures for the Infant Cohort at Wave Two (3 years), Dublin: Department of Children and Youth Affairs, https://www.esri.ie/publications/growing-up-in-ireland-design-instrumentation-and-procedures-for-the-infant-cohort-at-0