Dyfyniad APA

(1992). Advances in agronomy - Vol 47. London: Academic Press.

Dyfyniad Arddull Chicago

Advances in Agronomy - Vol 47. London: Academic Press, 1992.

Dyfyniad MLA

Advances in Agronomy - Vol 47. London: Academic Press, 1992.

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