Cita APA (7a ed.)

Bauerfeind, H. (1975). Burgruine Regenstein (o.A.).

Cita Chicago Style (17a ed.)

Bauerfeind, Hans. Burgruine Regenstein. o.A. Blankenburg, 1975.

Cita MLA (8a ed.)

Bauerfeind, Hans. Burgruine Regenstein. o.A. 1975.