Pyper, R. (1996). Aspects of accountability in the British system of government. Tudor Business Pub..
Lua i Stíl Chicago (17ú heag.)Pyper, Robert. Aspects of Accountability in the British System of Government. Eastham, Wirral, Merseyside: Tudor Business Pub., 1996.
Lua MLA (8ú heag.)Pyper, Robert. Aspects of Accountability in the British System of Government. Tudor Business Pub., 1996.
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