1. Cross, T.L., and Cross, J.R. (2011). Talent development: From theoretical conceptions to practical applications. Handbook of Counselors Serving Students with Gifts and Talents, Prufrock Press Inc.
2. Treffinger, D.J., Young, G.C., Nassab, C.A., and Wittig, C.V. (2004). Enhancing and Expanding Gifted Programs. The Levels of Service Approach, Prufrock Press.
3. What makes giftedness? Reexamining a definition;Renzulli;Phi Delta Kappan,1978
4. The nature of giftedness and talent;Passow;Gift. Child Q.,1981
5. VanTassel-Baska, J., and Little, C.A. (2021). Content-Based Curriculum for High-Ability Learners, Routledge.