References

Content
https://www.reference.com/hobbies-games/invented-ps2-2968d8ec1963d0f1
Guinness World Records 2009 Gamer's Edition
https://en.wikipedia.org/wiki/List_of_best-selling_Xbox_360_video_games
http://en.wikipedia.org/wiki/Game_Boy_Advance
http://en.wikipedia.org/wiki/Xbox_360
https://en.wikipedia.org/wiki/List_of_best-selling_PlayStation_3_video_games
www.ign.com/articles/2010/09/29/nintendo-conference-2010-details
https://www.nintendo.co.jp/ir/pdf/2010/101029e.pdf
www.nintendoworldreport.com/news/24774
http://www.vgchartz.com/article/267401/top-10-best-selling-nintendo-3ds-games-in-2016/
https://majornelson.com/2013/09/04/xbox-one-to-launch-on-november-22-2013-in-13-markets/
http://www.windowscentral.com/best-selling-xbox-one-games-all-time
https://www.engadget.com/2013/08/20/playstation-4-hitting-shelves-on-november-15/
http://gizmodo.com/021637/nintendo-ds-price-launch-date-announced
http://www.vgchartz.com/
https://www.polygon.com/gaming/2012/9/13/3321864/nintendo-wii-u-release-date-price
https://www.gamespot.com/forums/games-discussion-1000000/why-are-original-xboxs-so-expensive-29292437/
www.xbox.com/
https://www.gamespot.com/articles/xbox-360-pricing-revealed-299-and-399-models-due-at-launch/1100-6131245/
http://www.ign.com/articles/2006/09/14/us-wii-price-launch-date-revealed
https://www.sie.com/en/index.html
https://www.gamespot.com/articles/sony-announces-ps2-launch-date-and-price/1100-2568701/
https://www.kotaku.com/5737948/how-does-the-nintendo-3ds-price-stack-up
http://money.cnn.com/2006/05/08/technology/ps3_pricing/
https://www.gamespot.com/gallery/the-best-selling-nintendo-consoles-and-games-of-al/2900-1219/29/

Images
http://en.wikipedia.org/wiki/PlayStation_3
Wololo.net
kingdomhearts.wikia.com/wiki/Kingdom_Hearts_(game)
zelda.wikia.com/wiki/game_boy_advance
https://www.firstrategames.com/
https://www.amazon.com/Nintendo-3DS-Aqua-Blue/dp/B002I090AG
http://www.psu.com/feature/30159/Is-PlayStation-4-Neo-Really-%E2%80%98The-One%E2%80%99
http://www.trustedreviews.com/xbox-one-review
https://www.digitaltrends.com/gaming/microsoft-considered-free-xbox/
https://www.amazon.com/Nintendo-DS-Lite-Onyx-Black/dp/B000I10PY2
http://en.wikipedia.org/wiki/Wii
http://logok.org/playstation-logo/
http://twinfinite.net/2016/04/gaming-company-winning-2016-so-far/nintendo-logo/