Tyrangiel, Josh (September 9, 2015). "How Apple Built 3D Touch". Bloomberg News. Archived from the original on September 11, 2015. Retrieved September 12, 2015.
"Apple". June 12, 2016. Archived from the original on June 12, 2016. Retrieved September 16, 2017.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
Tyrangiel, Josh (September 9, 2015). "How Apple Built 3D Touch". Bloomberg News. Archived from the original on September 11, 2015. Retrieved September 12, 2015.