1. ^{{cite news|url=https://espn.go.com/classic/s/Ali_record.html |title=Muhammad Ali's ring record |work=ESPN |date=19 November 2003|accessdate=4 October 2016}}
2. ^{{cite book|title=Heavyweight Boxing in the 1970s:The Great Fighters and Rivalries|authors= Joe Ryan|publisher=McFarland & Company|pages = 107–8|year=2013}}
3. ^{{cite news|url=https://www.nytimes.com/2015/11/23/sports/bob-foster-whose-left-hook-decimated-all-but-the-heavyweights-dies-at-76.html |title=Bob Foster, Whose Left Hook Decimated All but the Heavyweights, Dies at 76 |work=New York Times|date=22 November 2015|accessdate=5 October 2016}}
4. ^{{cite book|title=Muhammad Ali: His Life and Times|author= Thomas Hauser|publisher=Simon & Schuster|pages = 249–50|year=1991}}
5. ^{{cite news|url=https://www.independent.co.uk/news/obituaries/bob-foster-boxer-who-muhammad-ali-said-had-the-punch-of-a-mule-and-was-world-light-heavyweight-a6761296.html |title=Bob Foster: Boxer who Muhammad Ali said had 'the punch of a mule' and was world light-heavyweight champion for six years|work=The Independent|date=4 December 2015|accessdate=5 October 2016}}
6. ^{{cite book|title=Muhammad Ali: The Glory Years|authors= Felix Dennis and Don Atyeo|publisher=miramax books|pages = 196–8|year=2003}}
7. ^{{cite news|url=https://www.si.com/vault/1972/12/04/613640/live-booze-girls-ali-this-is-fighting |title=LIVE! BOOZE! GIRLS! ALI! THIS IS FIGHTING? |work=Sports Illustrated |date=4 December 1972|accessdate=7 October 2016}}
8. ^{{cite news|url=https://www.telegraph.co.uk/news/obituaries/12033880/Bob-Foster-boxer-obituary.html|title=Bob Foster, boxer - obituary |work=The Telegraph |date=4 December 2015|accessdate=8 October 2016}}
9. ^{{cite news|url=https://news.google.com/newspapers?nid=2209&dat=19721122&id=T5wrAAAAIBAJ&sjid=DvwFAAAAIBAJ&pg=5930,3763804&hl=en|title=Ali KO's Foster in 8th |work=The Telegraph |date=22 November 1972|accessdate=11 October 2016}}
10. ^{{cite news|url=https://news.google.com/newspapers?nid=1298&dat=19721024&id=Cf5NAAAAIBAJ&sjid=yosDAAAAIBAJ&pg=7441,1030317&hl=en|title=Ali predicts eighth-round victory over Bob Foster |work=The Free-Lance Star |date=24 October 1972|accessdate=11 October 2016}}