(Forbes): https://www.forbes.com/profile/cristiano-ronaldo/#7e6debd8565d

 

Forbes (May): https://www.forbes.com/sites/sammay/2020/03/25/juventus-talisman-cristiano-ronaldo-and-agent-jorge-mendes-donate-to-portuguese-hospitals-in-the-wake-of-coronavirus/#71155fbb416a

 

Daily Mail (Winters): https://www.dailymail.co.uk/sport/football/article-6241381/The-15-year-journey-Cristiano-Ronaldos-Nike-boot-agreement.html

 

Didier Demazière, Morgan Jouvenet. The market work of football agents and the manifold valoriza- tions of professional football players. Economic Sociology (European Electronic Newsletter), Max Planck Institute for the Study of Societies, 2013, 15 (1), pp.29 – 40. Hal-01512300

 

(Statista): https://www.statista.com/statistics/685734/nike-ad-spend/

 

Contract Negotiations:

https://www.quora.com/What-negotiations-go-into-a-professional-soccer-players-contract

https://www.reuters.com/investigates/special-report/soccer-files-fees/

https://www.reevaldo.com/story/football-contract-transfer-negotiations

 

Loans vs. Transfers:

(1)https://www.sbnation.com/soccer/2014/7/28/5923187/transfer-window-soccer-europe-explained

(2) https://www.goal.com/en-us/news/what-is-financial-fair-play-and-how-does-it-work-ffp-rules/1ihlynh8s59i319l6nxx1z6kg5

(3) https://www.ft.com/content/9bd82b30-caf2-11e9-a1f4-3669401ba76f

(4)https://www.nytimes.com/2019/08/24/sports/soccer-loans.html

(5) https://www.thesun.co.uk/sport/football/10696768/loan-players-premier-league-per-season/

 

Super Agents:

(Tang): https://www.theworldweekly.com/reader/view/4265/how-superagents-are-changing-the-face-of-football

(Edwards): https://bleacherreport.com/articles/1671194-6-of-the-most-famous-agents-in-world-football-and-who-they-look-after

(Jones): https://bleacherreport.com/articles/2573374-ranking-world-footballs-10-most-influential-agents