BloomBenjamin S., ed. Taxonomy of Educational Objectives. Handbook I: Cognitive Domain.New York: David McKay Company, Inc., 1956.
2.
DohertyEdith J.S.EvansLouise C.. Self-Starter Kit for Independent Study: A Practical Guide to the Independent Study Process for the Gifted Student.Austin, Texas: Special Education Associates, 1980.
3.
RenzulliJoseph S.The Enrichment Triad Model: A Guide for Developing Defensible Programs for the Gifted and Talented.Mansfield, CT: Creative Learning Press, 1977.