WEBER, R. G. A. Stuart Farson, David Stafford, and Wesley K. Wark, eds. Security and Intelligence in a Changing World: New Perspectives for the 1990s; and Abram N. Shulsky. Silent Warfare: Understanding the World of Intelligence. Journal of Conflict Studies, [S. l.], v. 13, n. 1, 1993. Disponível em: https://journals.lib.unb.ca/index.php/JCS/article/view/15103. Acesso em: 2 dec. 2021.