Dyfyniad APA

(2009). SOIL ECOLOGY IN SUSTAINABLE AGRICULTURAL SYSTEMS. CRC Press.

Dyfyniad Arddull Chicago

SOIL ECOLOGY IN SUSTAINABLE AGRICULTURAL SYSTEMS. CRC Press, 2009.

Dyfyniad MLA

SOIL ECOLOGY IN SUSTAINABLE AGRICULTURAL SYSTEMS. CRC Press, 2009.

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