Norton, H. S. (1963). Modern transportation economics. Charles E merril books.
シカゴスタイル引用形Norton, Hugh S. Modern Transportation Economics. Ohio: Charles E merril books, 1963.
MLA引用形式Norton, Hugh S. Modern Transportation Economics. Charles E merril books, 1963.
警告: この引用は必ずしも正確ではありません.