Controllers, PlayStation Wiki
GameCube - Wikipedia
How to Delete Add Ons on PS4 (Remove DLCs but Keep Your Game Data)
DualShock 4 - PS4 Developer wiki
How to Buy Games from the PlayStation Store: 14 Steps
PlayStation controller - Wikipedia, ps
Controllers, PlayStation Wiki
The Evolution of the PlayStation Controller - IGN
PlayStation controller - Wikipedia, ps
Controllers, PlayStation Wiki
The Evolution of the PlayStation Controller - IGN