APA
Hardman M. L., Egan M. W. & Drew C. J. (1999). Human exeptionality. London: Allyn and Bacon.
Chicago
Hardman Michael L, Egan M Winston and Drew Clifford J. 1999. Human exeptionality. London: Allyn and Bacon.
Harvard
Hardman M. L., Egan M. W. and Drew C. J. (1999). Human exeptionality. London: Allyn and Bacon.
MLA
Hardman Michael L, Egan M Winston and Drew Clifford J. Human exeptionality. London: Allyn and Bacon. 1999.