Eldra P. Solomon, L. R. B. Biology. Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Eldra P. Solomon, Linda R. Berg. Biology. Thomson Learning.
Lua MLA (8ú heag.)Eldra P. Solomon, Linda R. Berg. Biology. Thomson Learning.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.