Dyfyniad APA

Davies, G., & Ghabbour, E. A. (2000). Humic Substances: Versatile componenets of Plants, Soil and water. The Royal Society of Chemistry.

Dyfyniad Arddull Chicago

Davies, Geoffrey, and Elham A. Ghabbour. Humic Substances: Versatile Componenets of Plants, Soil and Water. U.K: The Royal Society of Chemistry, 2000.

Dyfyniad MLA

Davies, Geoffrey, and Elham A. Ghabbour. Humic Substances: Versatile Componenets of Plants, Soil and Water. The Royal Society of Chemistry, 2000.

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