Walker, N. (1991). The United Kingdom police and European co-operation. A system of European police co-operation in 1992.
Chicago Style (17th ed.) CitationWalker, Neil. "The United Kingdom Police and European Co-operation." A System of European Police Co-operation in 1992 1991.
MLA (8th ed.) CitationWalker, Neil. "The United Kingdom Police and European Co-operation." A System of European Police Co-operation in 1992, 1991.
Warning: These citations may not always be 100% accurate.