But not so deep as to introduce
a new SOURCE of friction."
The Big Bang Theory Season 2, Episode 5
If this man had his own SOURCE
of product on this side of the border...
Breaking Bad Season 3, Episode 9
...caused by relative motion between
the SOURCE of the wave and the observer.
The Big Bang Theory Season 1, Episode 6
...competed
over the same food SOURCE...
The Big Bang Theory Season 4, Episode 18
she might not have been
a reliable SOURCE of information?
Game of Thrones Season 7, Episode 7