Smallwood, W. L., & Green, E. R. (1974). Biology (Teacher's ed.). Silver Burdett.
Lua i Stíl Chicago (17ú heag.)Smallwood, William L., agus Edna R. Green. Biology. Teacher's ed. Morristown, N.J.: Silver Burdett, 1974.
Lua MLA (8ú heag.)Smallwood, William L., agus Edna R. Green. Biology. Teacher's ed. Silver Burdett, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.