It's all about Nintendo as Wii, DS dominate November sales | Ars Technica
Where Switch, PS5 Rank Among the Best-Selling Video Game Consoles of All Time - IGN
PSP lifetime unit sales by region 2022 | Statista
Report: Consoles sold over 1.56 billion units since Atari 2600 in 1977 | TweakTown
A Visual Look at PlayStation Sales Numbers
Sony sales numbers reveal surging PS3, waning PSP | TechCrunch
Nintendo Switch OLED's lack of ambition has opened the door for a Sony PSP 5G | T3
NPD: Behind the Numbers, December 2008
Gamasutra - NPD: Behind the Numbers, February 2010
NPD 2008 sales figures | Video Game Sales Wiki | Fandom
June's console sales: oh dear, Nintendo wins again | TechCrunch
The first 2 years: PSP has sold better in the US than PS1, DS, more | Engadget
Japan's October Hardware Sales | TheSixthAxis
A Visual Look at PlayStation Sales Numbers | by Sohrab Osati | Sony Reconsidered
PSP Sales Are Up Year After Year | by Sohrab Osati | Sony Reconsidered
3DS vs PSP – VGChartz Gap Charts – October 2018 Update
PSP & PSV unit sales U.S. 2005-2019 | Statista
A Visual Look at PlayStation Sales Numbers
By the numbers: in portable gaming, Nintendo's loss is Apple's gain - The Verge
The first 2 years: PSP has sold better in the US than PS1, DS, more | Engadget
PlayStation Portable - Wikipedia
Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
Switch vs PS4 vs Xbox One Global Lifetime Sales - January 2021
Looking back at 2009 console sales and ahead to 2010 trends | Ars Technica
List of best-selling game consoles - Wikipedia
