Dyfyniad APA

Christy, L. C. (1972). Legislative principles of soil conservation. Food and Agriculture Organization of the United Nations.

Dyfyniad Arddull Chicago

Christy, Lawrence C. Legislative Principles of Soil Conservation. Rome: Food and Agriculture Organization of the United Nations, 1972.

Dyfyniad MLA

Christy, Lawrence C. Legislative Principles of Soil Conservation. Food and Agriculture Organization of the United Nations, 1972.

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