Solomon, E. P. (1993). Biology (4th.ed.). Saunders college.
Lua i Stíl Chicago (17ú heag.)Solomon, Eldra Pearl. Biology. 4th.ed. Philadelphia: Saunders college, 1993.
Lua MLA (9ú heag.)Solomon, Eldra Pearl. Biology. 4th.ed. Saunders college, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.