Thomas, R. M. (1991). Espionage and secrecy: The Official Secrets Acts 1911 - 1989 of the United Kingdom. Routledge.
Chicago Style (17th ed.) CitationThomas, Rosamund M. Espionage and Secrecy: The Official Secrets Acts 1911 - 1989 of the United Kingdom. London [u.a.]: Routledge, 1991.
MLA (9th ed.) CitationThomas, Rosamund M. Espionage and Secrecy: The Official Secrets Acts 1911 - 1989 of the United Kingdom. Routledge, 1991.
Warning: These citations may not always be 100% accurate.