- ↑ Ivan Reitman (1999). Ghostbusters- Commentary (1999) (DVD ts. 59:44-59:53). Columbia TriStar Home Video. Ivan Reitman says: "This was a stand up comedian who was so nervous working on this movie. He could barely get his lines out and he um in the initial shooting."
- ↑ Egon Spengler (1999). Ghostbusters- Commentary (1999) (DVD ts. 59:53-59:54). Columbia TriStar Home Video. Harold Ramis says: "He does a great Rodney Dangerfield."
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