Massassi trees originated in Jedi Search, a Star Wars Legends novel written by Kevin J. Anderson and released in 1994. They were confirmed to be canon in the reference book Ultimate Star Wars, which was released in 2015.
- Ultimate Star Wars
- Star Wars: Complete Locations
- Star Wars Day-at-a-Time Calendar 2020
- Ultimate Star Wars, New Edition
- Star Wars: Dawn of Rebellion: The Visual Guide