Graaff, K. M. (1994). A photographic atlas for the biology laboratory (2nd.ed.). Morton.
Lua i Stíl Chicago (17ú heag.)Graaff, Kent M. A Photographic Atlas for the Biology Laboratory. 2nd.ed. Colorado: Morton, 1994.
Lua MLA (9ú heag.)Graaff, Kent M. A Photographic Atlas for the Biology Laboratory. 2nd.ed. Morton, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.