Brashares, A. (2007). Forever in blue: The fouth summer of the sisterhood. New York.
Lua i Stíl Chicago (17ú heag.)Brashares, Ann. Forever in Blue: The Fouth Summer of the Sisterhood. Delacorte Press: New York, 2007.
Lua MLA (9ú heag.)Brashares, Ann. Forever in Blue: The Fouth Summer of the Sisterhood. New York, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.