Salomon, E. P. (2001). Biologia.
Lua i Stíl Chicago (17ú heag.)Salomon, Eldra Pearl. Biologia. 2001.
Lua MLA (9ú heag.)Salomon, Eldra Pearl. Biologia. 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)