Dyfyniad APA

(2004). Soil organic matter in sustainable agriculture. Boca Raton: CRC Press.

Dyfyniad Arddull Chicago

Soil Organic Matter in Sustainable Agriculture. Boca Raton: CRC Press, 2004.

Dyfyniad MLA

Soil Organic Matter in Sustainable Agriculture. Boca Raton: CRC Press, 2004.

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