Raven, P. H., & Johnson, G. B. (2002). Biology (6th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Raven, Peter H., agus George B. Johnson. Biology. 6th ed. Boston: McGraw-Hill, 2002.
Lua MLA (9ú heag.)Raven, Peter H., agus George B. Johnson. Biology. 6th ed. McGraw-Hill, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.