Bennett, D. P., & Humphries, D. A. (1965). Introduction to field biology. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)Bennett, Donald P., agus David A. Humphries. Introduction to Field Biology. London: Edward Arnold, 1965.
Lua MLA (9ú heag.)Bennett, Donald P., agus David A. Humphries. Introduction to Field Biology. Edward Arnold, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.