Dyfyniad APA

(2007). Forage: The scence of grassland agriculture. Ames: Iowa State Press.

Dyfyniad Arddull Chicago

Forage: The Scence of Grassland Agriculture. Ames: Iowa State Press, 2007.

Dyfyniad MLA

Forage: The Scence of Grassland Agriculture. Ames: Iowa State Press, 2007.

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