Dyfyniad APA

Soil Science Annual | Soil Science Society of Poland. Cambridge University Press.

Dyfyniad Arddull Chicago

Soil Science Annual | Soil Science Society of Poland. Cambridge University Press.

Dyfyniad MLA

Soil Science Annual | Soil Science Society of Poland. Cambridge University Press.

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