family guy: no dogs allowed reference

[unsped]

the brian goes to college episode, when brian gets kicked out of the new yorker. they put up a no dogs allowed sign and a voice says 'noooo doooogs allloowwwed'

im assuming there is some source material for this? anyone know?

 

[PrinceofWands]

Peanuts special. Snoopy keeps hearing it.

"Snoopy, Come Home" was the title btw.

 

[Rage187]

Charlie Brown, when Snoopy tries to get into the hospital, he also hears it again when he goes to live witht the little girl.

 

[Kipper]

Snoopy...didn't you get the second part of the reference, where he lies on top of the dog house?