Dyfyniad APA

De Mille, J. B. (1947). Strategic minerals: A summary of uses, world output, stockpiles, procurement. McGraw-Hill.

Dyfyniad Arddull Chicago

De Mille, John B. Strategic Minerals: A Summary of Uses, World Output, Stockpiles, Procurement. New York: McGraw-Hill, 1947.

Dyfyniad MLA

De Mille, John B. Strategic Minerals: A Summary of Uses, World Output, Stockpiles, Procurement. McGraw-Hill, 1947.

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