Martin Briner, Erik Erikson page보관됨 2006-08-21 - 웨이백 머신, 1999, on Briner's site about learning theories보관됨 2006-10-07 - 웨이백 머신, Department of Mathematical Sciences, Center for Assessment and Program Evaluation, US Military Academy at West Point. Accessed 24 November 2006.
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Martin Briner, Erik Erikson page보관됨 2006-08-21 - 웨이백 머신, 1999, on Briner's site about learning theories보관됨 2006-10-07 - 웨이백 머신, Department of Mathematical Sciences, Center for Assessment and Program Evaluation, US Military Academy at West Point. Accessed 24 November 2006.