The Norman conquests :
a trilogy of plays.
APA Citation
Ayckbourn, A. (1975). The Norman conquests: a trilogy of plays. London: Chatto & Windus.
MLA Citation
Ayckbourn, Alan, 1939-. The Norman Conquests: a Trilogy of Plays. London: Chatto & Windus, 1975.
Warning: These citations may not always be complete (especially for serials).