APA (7th ed.) Citation

Brown, R. A. (1969). The Norman conquest and the genesis of English castles.

Chicago Style (17th ed.) Citation

Brown, Reginald Allen. The Norman Conquest and the Genesis of English Castles. 1969.

MLA (9th ed.) Citation

Brown, Reginald Allen. The Norman Conquest and the Genesis of English Castles. 1969.

Warning: These citations may not always be 100% accurate.