ebrary, Inc, Gardiner, F., & Garmson, E. (2010). Plastics and the environment. iSmithers.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, Frances Gardiner, agus Eleanor Garmson. Plastics and the Environment. Shawbury, U.K.: iSmithers, 2010.
Lua MLA (9ú heag.)ebrary, Inc, et al. Plastics and the Environment. iSmithers, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.