Smith, R. L. (1995). Ecology and field biology (5th ed.). Harper Collins.
Lua i Stíl Chicago (17ú heag.)Smith, Robert Leo. Ecology and Field Biology. 5th ed. New York: Harper Collins, 1995.
Lua MLA (9ú heag.)Smith, Robert Leo. Ecology and Field Biology. 5th ed. Harper Collins, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.