Raven, P. H. (1992). Biology (3rd ed.). Mosby Year Book.
Lua i Stíl Chicago (17ú heag.)Raven, Peter H. Biology. 3rd ed. St. Louis: Mosby Year Book, 1992.
Lua MLA (9ú heag.)Raven, Peter H. Biology. 3rd ed. Mosby Year Book, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.