Cita APA (7a ed.)

Lang, E. (1921). Eupen, Malmedy, Monschau (2. Edition.). Albert Nauck.

Cita Chicago Style (17a ed.)

Lang, Eduard. Eupen, Malmedy, Monschau. 2. Edition. Berlin: Albert Nauck, 1921.

Cita MLA (9a ed.)

Lang, Eduard. Eupen, Malmedy, Monschau. 2. Edition. Albert Nauck, 1921.