
Is that a REFERENCE
to my speech impediment?
The Big Bang Theory Season 7, Episode 10

I marked the calendar
for future REFERENCE.
The Big Bang Theory Season 1, Episode 4

What?
You're familiar with the REFERENCE?
The Big Bang Theory Season 10, Episode 7

In REFERENCE to a database
much larger than anything
I know of in the park.
Westworld Season 2, Episode 4

I challenge you to find a single REFERENCE
to Kryptonian skin cells.
The Big Bang Theory Season 1, Episode 2