Dyfyniad APA

(1990). Irrigation of agricultural crops. Wisconsin, USA: American Society of Agronomy, Inc.

Dyfyniad Arddull Chicago

Irrigation of Agricultural Crops. Wisconsin, USA: American Society of Agronomy, Inc, 1990.

Dyfyniad MLA

Irrigation of Agricultural Crops. Wisconsin, USA: American Society of Agronomy, Inc, 1990.

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