PTT Public Company Limited (English Wikipedia)

Robinson, Gwen (August 27, 2012). "PTT buys control of Sakari for S$1.2bn". Financial Times. Bangkok. Retrieved 12 September 2012.
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hrw.org

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"Thailand to invest in Mozambique". Investvine.com. 2013-02-09. Retrieved 2013-02-16.
"Thailand's PTT expands in the Philippines". Investvine.com. 2013-02-17. Retrieved 2013-02-21.
"Thailand's PTT delays Malaysia investment". Investvine.com. 2013-04-01. Archived from the original on 2019-02-17. Retrieved 2013-04-06.
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"UNITED STATES OF AMERICA v. ROLLS-ROYCE PLC". US Department of Justice. Retrieved 1 March 2017.
"Rolls-Royce plc Agrees to Pay $170 Million Criminal Penalty to Resolve Foreign Corrupt Practices Act Case" (Press release). Department of Justice, Office of Public Affairs. 2017-01-17. Retrieved 1 March 2017.

Annual Report 2016 PTT Public Company Limited (PDF). PTT PCL. 2017. Retrieved 6 October 2017.

VIBOONCHART, NALIN (2010-04-16). "PTT turns to renewable energy". The Nation (Press release). Archived from the original on April 21, 2010. Retrieved 2014-11-29.
Changsorn, Pichaya (2014-08-31). "'Green chemicals' make major inroads into local market". The Nation (Press release). Archived from the original on September 1, 2014. Retrieved 2014-11-29.

"PTT: PTT PUBLIC COMPANY LIMITED; F/S & Highlights". The Stock Exchange of Thailand (SET). Retrieved 6 October 2017.

"Industry Group Leaders 2014". Dow Jones Sustainability Indices In Collaboration with RobecoSAM. Retrieved 2014-11-29.
"Industry Group Leader Report, THai Oil PCL" (PDF). RobecoSAM Sustainability Investing. Retrieved 2014-11-29.

"TBCSD". Thailand Business Council for Sustainable Development. Archived from the original on 2014-10-20. Retrieved 2014-11-29.

"Thaioil Public Company Limited". Thaioil Group Business Structure. Retrieved 2014-11-29.

"Royal Thai Government Gazette Book 95, Chapter 152, 28 December 1978" (PDF). Archived from the original (PDF) on March 18, 2015.
"Royal Thai Government Gazette Book 96, Chapter 114, 15 July 1979" (PDF). Archived from the original (PDF) on June 23, 2019.
"Thailand's PTT delays Malaysia investment". Investvine.com. 2013-04-01. Archived from the original on 2019-02-17. Retrieved 2013-04-06.
Maierbrugger, Arno (31 July 2013). "Thai oil spill: Romantic island is 'disaster zone' (video)". Inside Investor. Archived from the original on 12 August 2018. Retrieved 31 July 2013.
Popular island beach closed by oil slick
"TBCSD". Thailand Business Council for Sustainable Development. Archived from the original on 2014-10-20. Retrieved 2014-11-29.
VIBOONCHART, NALIN (2010-04-16). "PTT turns to renewable energy". The Nation (Press release). Archived from the original on April 21, 2010. Retrieved 2014-11-29.
"Bangchak Petroleum PLC". Greenergy Excellence Business. Archived from the original on 2014-11-26. Retrieved 2014-11-29.
Changsorn, Pichaya (2014-08-31). "'Green chemicals' make major inroads into local market". The Nation (Press release). Archived from the original on September 1, 2014. Retrieved 2014-11-29.