Knappe [Fototeam]. (1987). Der Harz. Harzmuseum.
Cita Chicago (17th ed.)Knappe [Fototeam]. Der Harz. Wernigerode: Harzmuseum, 1987.
Cita MLA (8th ed.)Knappe [Fototeam]. Der Harz. Harzmuseum, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.