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.