Dyfyniad APA

(1980). Drainage principles and applications. Vol III: Surveys and Investigations. The Netherland: ILRI.

Dyfyniad Arddull Chicago

Drainage Principles and Applications. Vol III: Surveys and Investigations. The Netherland: ILRI, 1980.

Dyfyniad MLA

Drainage Principles and Applications. Vol III: Surveys and Investigations. The Netherland: ILRI, 1980.

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