Aldrich, Richard J. (Richard James), 1961- (2012) Intelligence. In: Williams, Paul D., (ed.) Security studies : an introduction (2nd edition). Oxon ; New York: Routledge. ISBN 9780415782807 (In Press)

Bellamy, Alex J., 1975- and Williams, Paul, 1975-. (2009) The West and contemporary peace operations. Journal of Peace Research, Vol.46 (No.1). pp. 39-57. ISSN 0022-3433

Williams, Paul D. and Haacke, Jurgen. (2008) Security culture, transnational challenges and the economic community of west African states. Journal of Contemporary African Studies, Vol.26 (No.2). pp. 119-136. ISSN 0258-9001

Croft, Stuart (2008) What future for security studies? In: Williams, Paul D., (ed.) Security studies : an introduction. London: Routledge, pp. 497-511. ISBN 9780415425612

Williams, Paul D.. (2007) From non-intervention to non-indifference: the origins and development of the African Union's security culture. African Affairs, Vol.106 (No.423). pp. 253-279. ISSN 0001-9909