During the production of A New Hope, the mechanism to move Greedo's mouth broke just before he needed to be shot. De Aragon was then asked to put a clothespin between her teeth to move Greedo's mouth, making Greedo come to life. De Aragon claims that George Lucas practically saved her life when he saw her making odd gestures to signal that she couldn't breathe in the mask.
- "In the Star Wars Universe" — Star Wars Insider 37
- Star Wars: Chronicles
- Creating the Worlds of Star Wars: 365 Days
- The Making of Star Wars: The Definitive Story Behind the Original Film
- "Going Green" — Star Wars Insider 195
- The Moviemaking Magic of Star Wars: Creatures & Aliens
- The Star Wars Archives: Episodes IV–VI, 1977–1983