Garo in: Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig (eds.). 2013. エスノローグ: Languages of the World, 17th edition. Dallas, Texas: SIL International.
Lewis, M. Paul; Simons, Gary F.; Fennig, Charles D., eds. (2015). Ethnologue: Languages of the World (18th ed.). Dallas, Texas: SIL International.