APA
Powell-Smith V., Chappell D. & Simmonds D. (1989). An engineering contract dictionary. London: Legal Studies & Services.
Chicago
Powell-Smith Vincent, Chappell David and Simmonds Derek. 1989. An engineering contract dictionary. London: Legal Studies & Services.
Harvard
Powell-Smith V., Chappell D. and Simmonds D. (1989). An engineering contract dictionary. London: Legal Studies & Services.
MLA
Powell-Smith Vincent, Chappell David and Simmonds Derek. An engineering contract dictionary. London: Legal Studies & Services. 1989.