www.coe.int/en/web/data-protection/setting-democratic-global-standards-for-intelligence-agencies-the-way-forward
https://evergreen.loyola.edu/khula/www/strategic-intelligence/#international
https://usnwc.libguides.com/c.php?g=494120&p=3446903
www.dirjournal.com/blogs/the-worlds-best-intelligence-agencies/
www.deepstateblog.org/deep-states-guide-to-the-worlds-largest-intelligence-agencies/
https://en.wikipedia.org/wiki/Intelligence_agency
https://en.wikipedia.org/wiki/List_of_intelligence_agencies
https://en.wikipedia.org/wiki/Espionage
https://en.wikipedia.org/wiki/Counterintelligence
https://en.wikipedia.org/wiki/List_of_counterintelligence_organizations
https://en.wikipedia.org/wiki/Criminal_intelligence