1. Ajzen, I. (1988). Attitudes, personality and behaviour. Milton Keynes: Open University Press.
2. Ajzen, I. (2005). Attitudes, personality and behaviour, (2nd ed., ). England, UK: Open University Press.
3. Akiyama, T. (2004). Introducing speaking tests into Japanese Senior High School entrance examination. The University of Melbourne: Unpublished doctoral dissertation.
4. Allport, G. W. (1971). Attitudes. In K. Thomas (Ed.), Attitudes and behaviour. Harmondsworth: Penguin.
5. Bachman, L. F. (1990). Fundamental considerations in language testing. Oxford: Oxford University Press.