WALLACE, R. A. (1992). Biology The Wood Of Life Robert A. Wallace. Harper Collins Publishers.
Lua i Stíl Chicago (17ú heag.)WALLACE, Robert A. Biology The Wood Of Life Robert A. Wallace. Harper Collins Publishers, 1992.
Lua MLA (8ú heag.)WALLACE, Robert A. Biology The Wood Of Life Robert A. Wallace. Harper Collins Publishers, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.