Dyfyniad APA

James, A., & Evison, L. (1979). Biological indicators of water quality. Wiley.

Dyfyniad Arddull Chicago

James, A., and Lilian Evison. Biological Indicators of Water Quality. New York: Wiley, 1979.

Dyfyniad MLA

James, A., and Lilian Evison. Biological Indicators of Water Quality. Wiley, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.