Sony Explains Why Its PlayStation 4 Costs $1,845 In Brazil : The Two-Way : NPR
PlayStation 4 - Wikipedia
Chart: Advantage Sony - PS4 Price Undercuts Xbox One by $100 | Statista
Sony launches massive summer price drops: $50 off PS4 Pro, new Limited Edition PS4, more
Las ventas de PS5 siguen superando a las de PS4 con un ritmo imparable
Xbox One or PS4 [PlayStation 4]: Which New Video Game Console Should You Buy? A Comparison of Xbox 1 and PS4 Price, Features, Specs, Games and Release Dates eBook de Eric Michael -