Romer, K. (1980). Facts about Germany: The Federal Republic of Germany. Gutersloh : Lexikothek.
Cita Chicago Style (17a ed.)Romer, Karl. Facts About Germany: The Federal Republic of Germany. Gutersloh : Lexikothek, 1980.
Cita MLA (9a ed.)Romer, Karl. Facts About Germany: The Federal Republic of Germany. Gutersloh : Lexikothek, 1980.
Precaución: Estas citas no son 100% exactas.