Dyfyniad APA

Berkin, C. (1991). America: Yesterday and today. Scott,Foresman.

Dyfyniad Arddull Chicago

Berkin, Carol. America: Yesterday and Today. Illinois: Scott,Foresman, 1991.

Dyfyniad MLA

Berkin, Carol. America: Yesterday and Today. Scott,Foresman, 1991.

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