Dyfyniad APA

Roberts, D. (1980). American railroads: The case for nationalization. New York: Pathfinder.

Dyfyniad Arddull Chicago

Roberts, Dick. American Railroads: The Case for Nationalization. New York: Pathfinder, 1980.

Dyfyniad MLA

Roberts, Dick. American Railroads: The Case for Nationalization. New York: Pathfinder, 1980.

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