Neisser, U. , Boodoo, G. , Bouchard, T.J. , Boykin, A.W. , Brody, N. , et al. (1996). Intelligence: Knowns and unknowns. American Psychologist, 51, 77-101. pdf
udel.edu
Gottfredson, L. S. (1997). Why g matters: The complexity of everyday life. Intelligence, 24, 79–132. pdf
Duckworth, A.L. & Quinn, P.D. (2009). Development and validation of the Short Grit Scale (GRIT–S). Journal of Personality Assessment, Vol 91(2), pp. 166-174.[۱]بایگانیشده در ۹ ژوئن ۲۰۱۶ توسط Wayback Machine
Duckworth, A.L. & Quinn, P.D. (2009). Development and validation of the Short Grit Scale (GRIT–S). Journal of Personality Assessment, Vol 91(2), pp. 166-174.[۱]بایگانیشده در ۹ ژوئن ۲۰۱۶ توسط Wayback Machine