Stern, Yaakov. "Cognitive Reserve and Aging." Imaging the Aging Brain. : Oxford University Press, 2009-10-22. Oxford Scholarship Online. 2010-02-01. Date Accessed 21 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195328875.001.0001/acprof-9780195328875-chapter-6>.
Stern, Y.(2009-10-22). Cognitive Reserve and Aging. In Imaging the Aging Brain. : Oxford University Press. Retrieved 21 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195328875.001.0001/acprof-9780195328875-chapter-6.
Stern, Yaakov. "Cognitive Reserve and Aging." In Imaging the Aging Brain. : Oxford University Press, 2009-10-22. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195328875.001.0001/acprof-9780195328875-chapter-6.
Stern Y. Cognitive Reserve and Aging. In: Jagust W, D'Esposito M. Imaging the Aging Brain. Oxford University Press; 2009. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195328875.001.0001/acprof-9780195328875-chapter-6. Accessed May 21, 2013.