7Lakoff, G. & M.Johnson. Metaphors We Live By [M]. Chicago: The University of Chicago Press, 1980.
8Langacar,R. W. Foundations of Cognitive Grammar, Vol. I. Theoretical Prerequisites[ M]. Stanford University Press, 1987.
9Yo Matsumoto. On the Extension of Body-part Nouns to Object-part Nouns and Spatial Adpositions[A]. In Cognition and Function in Language[C] (15-28). Barbara A. Fox et al eds. Standford, California:CSLI Publicatons, 2000.
10The Oxford Dictionary of English Etymology. New York: Oxford University press, 1982:1,82,889.