Jackson, J. D. (1989). Biology encounters (3rd.ed.). Burgress International.
Lua i Stíl Chicago (17ú heag.)Jackson, John D. Biology Encounters. 3rd.ed. Edina: Burgress International, 1989.
Lua MLA (9ú heag.)Jackson, John D. Biology Encounters. 3rd.ed. Burgress International, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.