(1974). Harz: Harzvorland, Braunschweig, Hildesheim. Thiemig.
Cita Chicago (17th ed.)Harz: Harzvorland, Braunschweig, Hildesheim. München: Thiemig, 1974.
Cita MLA (8th ed.)Harz: Harzvorland, Braunschweig, Hildesheim. Thiemig, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.