![as a source of information
as a source of information](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
as a SOURCE of information
The Big Bang Theory Season 11, Episode 16
![...caused by relative motion between
the source of the wave and the observer.
...caused by relative motion between
the source of the wave and the observer.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
...caused by relative motion between
the SOURCE of the wave and the observer.
The Big Bang Theory Season 1, Episode 6
![Leonard, it is a source of great pain
to me and my family...
Leonard, it is a source of great pain
to me and my family...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Leonard, it is a SOURCE of great pain
to me and my family...
The Big Bang Theory Season 4, Episode 18
![If this man had his own source
of product on this side of the border...
If this man had his own source
of product on this side of the border...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
If this man had his own SOURCE
of product on this side of the border...
Breaking Bad Season 3, Episode 9
![she might not have been
a reliable source of information?
she might not have been
a reliable source of information?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
she might not have been
a reliable SOURCE of information?
Game of Thrones Season 7, Episode 7