Tony Buckingham (English Wikipedia)

"Heritage Oil". Heritage Oil Limited. Heritage Oil Plc. 2014. Retrieved 16 July 2015.
"Heritage Oil – Overview". Heritage Oil Limited. Heritage Oil Plc. 2014. Retrieved 16 July 2015.

heritageoilplc.com

"Archived copy" (PDF). Archived from the original (PDF) on 2020-03-08. Retrieved 2012-04-02.{{cite web}}: CS1 maint: archived copy as title (link)

Cilliers, Jakkie; Mason, Peggy; Pech, Khareen (January 1999). "PEACE, PROFIT OR PLUNDER? The Privatisation of Security in War-Torn African Societies :- Chapter 5: Executive Outcomes – A corporate conquest p.106, №18" (PDF). ISS Africa. Institute for Security Studies in Africa. Archived from the original (PDF) on 4 March 2016. Retrieved 16 July 2015.
Cilliers, Jakkie; Mason, Peggy; Pech, Khareen (January 1999). "PEACE, PROFIT OR PLUNDER? The Privatisation of Security in War-Torn African Societies :- Chapter 5: Executive Outcomes – A corporate conquest p.88" (PDF). ISS Africa. Institute for Security Studies in Africa. Archived from the original (PDF) on 4 March 2016. Retrieved 16 July 2015.

Staff Reporter (24 January 1997). "Africa's new-look dogs of war". No. Online. Mail & Guardian. Africa. Retrieved 16 July 2015.

"Executive Outcomes". Source Watch. The Center for Media and Democracy. 15 November 2006. Retrieved 16 July 2015.

Buckingham, Tony. "Tony Buckingham: Welcome to my Blog". Tony Buckingham. Tony Buckingham, Heritage Oil. Retrieved 16 July 2015.

"Archived copy" (PDF). Archived from the original (PDF) on 2020-03-08. Retrieved 2012-04-02.{{cite web}}: CS1 maint: archived copy as title (link)
"Who is Tony Buckingham? And why does everyone want to talk to him? - News - the Independent". Independent.co.uk. Archived from the original on 2012-08-14. Retrieved 2017-10-31.
Cilliers, Jakkie; Mason, Peggy; Pech, Khareen (January 1999). "PEACE, PROFIT OR PLUNDER? The Privatisation of Security in War-Torn African Societies :- Chapter 5: Executive Outcomes – A corporate conquest p.106, №18" (PDF). ISS Africa. Institute for Security Studies in Africa. Archived from the original (PDF) on 4 March 2016. Retrieved 16 July 2015.
Cilliers, Jakkie; Mason, Peggy; Pech, Khareen (January 1999). "PEACE, PROFIT OR PLUNDER? The Privatisation of Security in War-Torn African Societies :- Chapter 5: Executive Outcomes – A corporate conquest p.88" (PDF). ISS Africa. Institute for Security Studies in Africa. Archived from the original (PDF) on 4 March 2016. Retrieved 16 July 2015.

Purcell, Will. "DiamondWorks remembers its dead, in silence". Stockwatch Street Wire. Canada.