Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
3DS vs PSP – VGChartz Gap Charts – October 2018 Update
Nintendo's Numbers: The State Of The Industry
NPD Seventh generation | Video Game Sales Wiki | Fandom
PS Vita vs 3DS. Is The 3DS Winning The Handheld War? - Wololo.net
The first 2 years: PSP has sold better in the US than PS1, DS, more | Engadget
Graph-Age: Worldwide NDS & PSP cumulative monthly sales & shipments by region! | Page 4 | NeoGAF
Looking back at 2009 console sales and ahead to 2010 trends | Ars Technica
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
Analysis: PSP Go To Face 'Slow Death At Retail' In U.S.?
Apple slams PSP, DS at iPhone/iPod conference - GameSpot
Switch vs DS Sales Comparison – DS Lead Grows May 2020
RIP, PSP: What the Vita can learn from Sony's late, great handheld - CNET
PSP lifetime unit sales by region 2022 | Statista
The annual sales number of PSP overtakes Nintendo DS for the first time since its release at the top of all game machines - GIGAZINE
Semi-Annual Financial Results Briefing for Fiscal Year Ending March 2012
PSP VS DS Graphics Comparison | N4G
Nintendo DS vs. The Sony PSP - InfiniGEEK
Games: Nintendo – the winner takes it all – eurotechnology.com
sales share of consoles in 4th generation onwards, in N. America/Europe/Japan regions (notice how stronger Xbox is in N. America) : r/xbox
Sony PSP Versus Nintendo DS - The Sales Showdown - Pure Nintendo
Who won? First-week sales of PS Vita vs. PSP vs. 3DS vs. DS (infographic) | VentureBeat
Sony figures show PSP sales falling - but more sold than you may expect | Technology | The Guardian
Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
Nintendo 3DS Reaches 5 Million In Japan, Breaks Record - Siliconera
