Dyfyniad APA

Burgan, M. (2008). United States of America. Children's Press.

Dyfyniad Arddull Chicago

Burgan, Michael. United States of America. Children's Press, 2008.

Dyfyniad MLA

Burgan, Michael. United States of America. Children's Press, 2008.

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