Speck, H. (1982). Unstruttal. Brockhaus.
Cita Chicago (17th ed.)Speck, Hans-Dieter. Unstruttal. Leipzig: Brockhaus, 1982.
Cita MLA (8th ed.)Speck, Hans-Dieter. Unstruttal. Brockhaus, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)