Dyfyniad APA
ebrary, Inc, Gardiner, F., & Garmson, E. (2010). Plastics and the environment. iSmithers.
Dyfyniad Arddull Chicago
ebrary, Inc, Frances Gardiner, and Eleanor Garmson. Plastics and the Environment. Shawbury, U.K.: iSmithers, 2010.
Dyfyniad MLA
ebrary, Inc, et al. Plastics and the Environment. iSmithers, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.