1. Abou Nazel MW, Fahmy SI, Younis IA, Seif el-Din AG, Abdel Fatah M, Mokhtar S, Ayoub AI (1991) A study of depression among Alexandria preparatory school adolescents. J Egypt Public Health Assoc 66:649–674
2. Awaritefe A (1988) The Beck Depressive Inventory in relation to some commonly used tests in Nigeria. Nigerian J Basic Appl Psychol 1:23–28
3. Beck AT, Ward CH, Mendelson M, Mock J, Erbaugh J (1961) An inventory for measuring depression. Arch Gen Psychiatry 4:561–571
4. Berganza CE, Aguilar G (1992) Depression in Guatemalan adolescents Adolescence 27:771–782
5. Birmaher B, Ryan ND, Williamson D, Brent DA, Kaufman J, Dahl RE, Perel J, Nelson B (1996) Childhood and adolescent depression: a review of the past 10 years – Part I. J Am Acad Child Adolesc Psychiatry 35:1427–1439