Books
                                                                Simon J. Brooker, Sian Clarke, Deepika Fernando, Caroline W. Gitonga, Joaniter Nankabirwa, David Schellenberg, Brian Greenwood
                                                                Part 3: Chapter 14, pg 183. In: Disease Control Priorities: Child and adolescent health and development. Editors: D.A.P.Bundy, N.de Silva, S.Horton, D.T.Jamison, G.C.Patton.  3rd Edition: Volume 8.  World Bank Group. 2017. ISBN: 978-1-4648-0517-2.
                                                                                                                                Publication year: 2017