Dyfyniad APA

Duke, C. V., & Williams, C. D. (2008). Chemistry for environmental and earth sciences. CRC Press.

Dyfyniad Arddull Chicago

Duke, Catherine V.A, and Craig D. Williams. Chemistry for Environmental and Earth Sciences. Boca Raton: CRC Press, 2008.

Dyfyniad MLA

Duke, Catherine V.A, and Craig D. Williams. Chemistry for Environmental and Earth Sciences. CRC Press, 2008.

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