3DS vs PSP – VGChartz Gap Charts – February 2018 Update
PSP sales reach 70 million units worldwide | VG247
Nintendo Switch total sales have officially surpassed Wii, PlayStation - SlashGear
PSP & PSV unit sales U.S. 2005-2019 | Statista
Where Switch, PS5 Rank Among the Best-Selling Video Game Consoles of All Time - IGN
A Graphic of Overall Persona Game Sales in Japan for January 2017 - Persona Central
PSP Sales Are Up Year After Year | by Sohrab Osati | Sony Reconsidered
17,618: That's how many PSP Go Sony sold in Japan in 2010 | TechCrunch
Semi-Annual Financial Results Briefing for Fiscal Year Ending March 2012
List of best-selling game consoles - Wikipedia
Nintendo Switch surpasses the SNES in total sales - SlashGear
PSP lifetime unit sales by region 2022 | Statista
Japanese sales figures highlight 3DS' holiday dominance | Pocket Gamer.biz | PGbiz
PlayStation 4 sales hit 112.3 million worldwide, up 1.9 million in Q1 | TweakTown
The annual sales number of PSP overtakes Nintendo DS for the first time since its release at the top of all game machines - GIGAZINE
PlayStation Portable - Wikipedia
PSP & PSV unit sales worldwide 2004-2022 | Statista
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
Corporate Management Policy Briefing/Third Quarter Financial Results Briefing for Fiscal Year Ending March 2012
Sony PSP Go suffering appalling Japanese sales? - SlashGear
Long live the PS...P?
This Week In Sales: The Legend of Heroes Makes Sales In The Sky - Siliconera
Total software sales for 3DS reach 100 million in Japan
