7Bachman, L, E Fundamental Considerations in Language Testing [M]. Oxford: Oxford University Press, 1990,
8Black, M. Models and Metaphors [M]. New York: Cornell University Press, 1962.
9Block, D. Who framed SLA research? Problem framing and metaphoric accounts of the SLA research process [A]. Cameron, L. & Low, G. Researching and Applying Metaphor [C]. Cambridge: Cambridge University Press, 1999.
10Cameron, L. Operationalising 'metaphor' for applied linguistic research [A]. Cameron, L. & Low, G. Researching and Applying Metaphor [C]. Cambridge: Cambridge University Press, 1999.