Dyfyniad APA

Pamphlets and books: Classified list. The America Press.

Dyfyniad Arddull Chicago

Pamphlets and Books: Classified List. New York: The America Press.

Dyfyniad MLA

Pamphlets and Books: Classified List. The America Press.

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