Dyfyniad APA

Norton, H. S. (1963). Modern transportation economics. Charles E merril books.

Dyfyniad Arddull Chicago

Norton, Hugh S. Modern Transportation Economics. Ohio: Charles E merril books, 1963.

Dyfyniad MLA

Norton, Hugh S. Modern Transportation Economics. Charles E merril books, 1963.

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