Dyfyniad APA
Bashkin, V. N., & Howarth, R. W. (2002). Modern biogeochemistry. Kluwer Academic Publishers.
Dyfyniad Arddull Chicago
Bashkin, V. N., and Robert Warren Howarth. Modern Biogeochemistry. Dordrecht ; Boston: Kluwer Academic Publishers, 2002.
Dyfyniad MLA
Bashkin, V. N., and Robert Warren Howarth. Modern Biogeochemistry. Kluwer Academic Publishers, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.