Nintendo vs Sony

https://en.wikipedia.org/wiki/Nintendo

https://en.wikipedia.org/wiki/Sony

https://www.gamespot.com/forums/system-wars-314159282/nintendo-or-sony-greatest-console-company-of-all-t-31551296/

https://www.newsweek.com/nintendo-vs-sony-epic-gaming-partnership-ended-shambles-940717

https://www.fool.com/investing/2017/07/15/better-buy-nintendo-vs-sony.aspx

https://www.trustedreviews.com/opinion/nintendo-switch-vs-ps4-and-xbox-one-2949935

https://www.sony.net/SonyInfo/csr_report/employees/info/

https://phys.org/news/2018-04-sony-profits-soar-seven-fold-bn.html

https://gamingbolt.com/we-wont-forget-what-made-us-successful-going-forward-says-sonys-suehei-yoshida

https://www.engadget.com/2017/04/28/sony-playstation-earnings-fiscal-year-2017/

https://www.mcvuk.com/business/ssuper-mario-run-passes-60m-revenue-mark

https://www.businessinsider.com/nintendo-switch-sales-on-track-for-20-million-units-2018-1

https://gamerant.com/super-mario-run-150-million-downloads-less-10-percent-buy-104/