[Uri’el-2012]

Apple has a history of lifting technology from other's efforts, witness the mouse

Douglas Engelbart of the Stanford Research Institute invented the mouse in 1964

The first mouse to be shipped as a part of a computer and was intended
for personal computer navigation was Apple's Macintosh I Mouse.

[TC Rider]

Your citation is wrong, the first mouse shipped as part of a personal computer system would have been the Lisa.

TC