Silk, N., & Ciruna, K. (2005). A practitioner's guide to freshwater biodiversity conservation (Reprint ed.). Washington, DC: Island Press.
Dyfyniad Arddull ChicagoSilk, Nicole., and Kristine Ciruna. A Practitioner's Guide to Freshwater Biodiversity Conservation. Reprint ed. Washington, DC: Island Press, 2005.
Dyfyniad MLASilk, Nicole., and Kristine Ciruna. A Practitioner's Guide to Freshwater Biodiversity Conservation. Reprint ed. Washington, DC: Island Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.