was an obvious REFERENCE
The Big Bang Theory Season 7, Episode 3
Yeah, for future REFERENCE,
that's a while.
The Big Bang Theory Season 7, Episode 15
What REFERENCE?
The Big Bang Theory Season 8, Episode 19
...you might wanna skip the REFERENCE
to bowel movements.
The Big Bang Theory Season 1, Episode 1
...you'd be in a non-inertial
REFERENCE frame and would...
The Big Bang Theory Season 1, Episode 3