Dyfyniad APA

Kumada, K. (1987). Chemistry of soil organic matter. Tokyo: Japan Scientific Societies Press.

Dyfyniad Arddull Chicago

Kumada, Kyoichi. Chemistry of Soil Organic Matter. Tokyo: Japan Scientific Societies Press, 1987.

Dyfyniad MLA

Kumada, Kyoichi. Chemistry of Soil Organic Matter. Tokyo: Japan Scientific Societies Press, 1987.

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