Sabrina the Teenage Witch (1996 TV Movie)
The 1996 film came first and led to the creation of the 1996 TV series. Both starred Melissa Joan Hart; the series used a different cast.
When Katy threatens to reveal Sabrina's secret, Sabrina mimics the Wicked Witch of the West and even says her line "I'll get you my pretty, and your little dog too!"
Referenced towards the end.
Elka mentions the show when talking to Jameson.