1. ^{{cite web|author=Sandeep Balakrishna|url=http://www.niticentral.com/2012/09/intel-agencies-fact-fiction.html|title=Intel agencies: Fact & Fiction|publisher=Niti Central|date=|accessdate=2013-01-31|archive-url=https://web.archive.org/web/20130127084111/http://www.niticentral.com/2012/09/intel-agencies-fact-fiction.html|archive-date=2013-01-27|dead-url=yes|df=}}
2. ^¹ {{cite book|title=India foreign policy & government guide.|year=2003|publisher=International Business Publications, USA|location=Washington, DC|isbn=0739782983|pages=100–102|edition=Updated repr.}}
3. ^{{cite book|last=Ball|first=Desmond|title=Signals intelligence (SIGINT) in South Asia : India, Pakistan, Sri Lanka (Ceylon)|year=1996|publisher=Strategic and Defence Studies Centre, Research School of Pacific Studies, Australian National University|location=Canberra, Australia|isbn=0731524837|page=27}}