Goodman, E. (2008). Guide to the Gre Test. Spark Notes Publishing.
Lua i Stíl Chicago (17ú heag.)Goodman, Eric. Guide to the Gre Test. New York, NY: Spark Notes Publishing, 2008.
Lua MLA (9ú heag.)Goodman, Eric. Guide to the Gre Test. Spark Notes Publishing, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.