1. Gibbs, R. (1994). The Poetics of Mind: Figurative Thought, Language and Understanding, Cambridge University Press.
2. Nippold, M.A. (1998). Later Language Development: The School-Age and Adolescent Years, Pro-Ed. [2nd ed.].
3. Winner, E. (1997). The Point of Words: Children’s Understanding of Metaphor and Irony, Harvard University Press.
4. Children and Metaphors;Vosniadou;Child Dev.,1987
5. Testing the metaphoric competence of the young child: Paraphrase versus enactment;Vosniadou;Hum. Dev.,1986