"Maximum Breaks (Professional Competition Only)". FCSnooker.co.uk. Preston, England: The Frank Callan Suite. 2009. "Unofficial 147s" section. Archived from the original on 8 January 2012. Retrieved 24 December 2011. FCS is a snooker equipment manufacturer that also runs a snooker statistics site.
Stooke, Michael P. (14 March 2010). "Definitions of Terms used in Snooker and English Billiards". SnookerGames.co.uk. Dorset, England: self-published. Archived from the original on 17 April 2012. Retrieved 25 December 2011. This tertiary source reuses information from other sources without citing them in detail. Stooke is a snooker instructor and writer whose work appears to be presumptively reliable, based on the sources he does cite throughout his materials.
Stooke, Michael P. (14 March 2010). "Definitions of Terms used in Snooker and English Billiards". SnookerGames.co.uk. Dorset, England: self-published. Archived from the original on 17 April 2012. Retrieved 25 December 2011. This tertiary source reuses information from other sources without citing them in detail. Stooke is a snooker instructor and writer whose work appears to be presumptively reliable, based on the sources he does cite throughout his materials.
"Maximum Breaks (Professional Competition Only)". FCSnooker.co.uk. Preston, England: The Frank Callan Suite. 2009. "Unofficial 147s" section. Archived from the original on 8 January 2012. Retrieved 24 December 2011. FCS is a snooker equipment manufacturer that also runs a snooker statistics site.