APA (7th ed.) Citation

Henderson, W. O. (1959). The Zollverein ([1st U. S. ed.].). Quadrangle Books.

Chicago Style (17th ed.) Citation

Henderson, W. O. The Zollverein. [1st U. S. ed.]. Chicago: Quadrangle Books, 1959.

MLA (9th ed.) Citation

Henderson, W. O. The Zollverein. [1st U. S. ed.]. Quadrangle Books, 1959.