Dyfyniad APA

Nye, R., & Morpurgo, J. (1970). A History of the United States (3rd ed.). Penguin.

Dyfyniad Arddull Chicago

Nye, R.B, and J.E Morpurgo. A History of the United States. 3rd ed. Middlesex: Penguin, 1970.

Dyfyniad MLA

Nye, R.B, and J.E Morpurgo. A History of the United States. 3rd ed. Penguin, 1970.

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