United States. Office of the Deputy Under Secretary of Defense for Policy Review. Directorate of Information Security. (1982). A Guide to marking classified documents. The Directorate.
Chicago Style (17th ed.) CitationUnited States. Office of the Deputy Under Secretary of Defense for Policy Review. Directorate of Information Security. A Guide to Marking Classified Documents. [Washington, D.C.]: The Directorate, 1982.
MLA (9th ed.) CitationUnited States. Office of the Deputy Under Secretary of Defense for Policy Review. Directorate of Information Security. A Guide to Marking Classified Documents. The Directorate, 1982.
Warning: These citations may not always be 100% accurate.