Sheffield, Brandon (September 5, 2011). "Defining Resistance 3". Gamasutra. Archived from the original on September 21, 2015. Retrieved November 25, 2020.
Sheffield, Brandon (September 5, 2011). "Defining Resistance 3". Gamasutra. Archived from the original on September 21, 2015. Retrieved November 25, 2020.