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Martin Briner, Erik Erikson page互联网档案馆的存檔,存档日期2006-08-21., 1999, on Briner's site about learning theories互联网档案馆的存檔,存档日期2006-10-07., USMA Department of Mathematical Sciences, Center for Assessment and Program Evaluation (CAPE), United States Military Academy at West Point. Accessed 24 November 2006.