Dyfyniad APA

Knutson, C. (1998). How to reduce drought risk. Western Drought Cooodination Council.

Dyfyniad Arddull Chicago

Knutson, Cody. How to Reduce Drought Risk. Western Drought Cooodination Council, 1998.

Dyfyniad MLA

Knutson, Cody. How to Reduce Drought Risk. Western Drought Cooodination Council, 1998.

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