Sunday World (English Wikipedia)

"The Herald (Series)" (PDF). Paid Newspapers. Republic of Ireland Circulation Certificate. Audit Bureau of Circulations. July–December 2015.
"The Herald (Series)" (PDF). Paid Newspapers. Republic of Ireland Circulation Certificate. Audit Bureau of Circulations. January–June 2016.
"Sunday World (Series)" (PDF). Paid Newspapers. Republic of Ireland Circulation Certificate. Audit Bureau of Circulations. January–June 2017.
"Sunday World (Series)" (PDF). Paid Newspapers. Republic of Ireland Circulation Certificate. Audit Bureau of Circulations. January–June 2018.
"Sunday World (Series)" (PDF). Paid Newspapers. Republic of Ireland Circulation Certificate. Audit Bureau of Circulations. July–December 2018.

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Slattery, Laura (11 January 2013). "INM takes sole responsibility for 'Irish Daily Star'". The Irish Times. Archived from the original on 16 February 2013.

"PSNI chief 'shocked' by picture". BBC News. 2 November 2009. Retrieved 3 May 2010.

"Irish News crowned daily newspaper of the year". Hold the Front Page (29 April 2008). Archived from the original on 13 May 2008. Retrieved 19 June 2008.

McKittrick, David (5 April 2006). "The Execution: How an IRA man turned British spy met his brutal end". The Independent. London. Archived from the original on 3 November 2012. Retrieved 3 May 2010.

McDonald, Henry. "RUC chief blames loyalists for murder". The Guardian. 1 October 2001
Cusack, Jim. "Obituary: Martin O'Hagan". The Guardian. 1 October 2001
"Dispatches | Media". The Guardian. London. 10 April 2006. Retrieved 3 May 2010.
Greenslade, Roy (2 November 2009). "Roy Greenslade: 50 complaints to PCC over Sunday World suicide picture". The Guardian. London. Retrieved 3 May 2010.

"Tribune News article, 2009". Tribune.ie. 12 April 2009. Archived from the original on 3 February 2010. Retrieved 3 May 2010.

McKittrick, David (5 April 2006). "The Execution: How an IRA man turned British spy met his brutal end". The Independent. London. Archived from the original on 3 November 2012. Retrieved 3 May 2010.
"Tribune News article, 2009". Tribune.ie. 12 April 2009. Archived from the original on 3 February 2010. Retrieved 3 May 2010.
"Irish News crowned daily newspaper of the year". Hold the Front Page (29 April 2008). Archived from the original on 13 May 2008. Retrieved 19 June 2008.
"ABC Sunday Newspaper Circulation July December 2013". iLevel. 20 February 2014. Archived from the original on 12 January 2016.
"ABC Sunday Newspaper Circulation January-June 2015". ilevel. Archived from the original on 6 September 2015. Retrieved 20 August 2015.
Doyle, Conor. "Irish Newspaper Circulation July-Dec 2016 Island of Ireland Report - Media and Marketing Consulting, PPC, SEO Ireland, Search Engine Optimisation". www.ilevel.ie. Archived from the original on 18 February 2017. Retrieved 18 February 2017.
Doyle, Conor. "Irish Newspaper Circulation July-Dec 2017 Island of Ireland Report - Media and Marketing Consulting, PPC, SEO Ireland, Search Engine Optimisation". www.ilevel.ie. Archived from the original on 6 November 2018. Retrieved 22 February 2018.