References

• Bruno de Finetti (2017). Theory of Probability: A Critical Introductory Treatment. Wiley.
• Gerd Gigerenzer (2015). Risk Savvy: How to Make Good Decisions. Penguin Books.
• Richard Jeffrey (2004). Subjective Probability: the Real Thing. Cambridge University Press.
• Frank Ramsey (1926). Truth and Probability. Available here.
• Leonard Savage (1954). The Foundations of Statistics. Dover.
• Nassim N. Taleb (2017). Skin in the game. Penguin Books.

Regarding Bruno de Finetti, I also suggest checking this great website: www.brunodefinetti.it

I think that the simple Wikipedia page on the classical definition of probability is a good starting point for those interested in going deeper into the analysis.