Dyfyniad APA

(1985). Catalogue 1985: Equipment for soil research. The Netherland: EijKelkamp.

Dyfyniad Arddull Chicago

Catalogue 1985: Equipment for Soil Research. The Netherland: EijKelkamp, 1985.

Dyfyniad MLA

Catalogue 1985: Equipment for Soil Research. The Netherland: EijKelkamp, 1985.

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