Raven, P. H. (1988). Understanding Biology. Times mirror.
Lua i Stíl Chicago (17ú heag.)Raven, Peter H. Understanding Biology. Times mirror, 1988.
Lua MLA (8ú heag.)Raven, Peter H. Understanding Biology. Times mirror, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.