Style de citation APA

Bulka, H. D. (1984). Facts about Germany: The Federal Republic of Germany. Bertelsmann, Lexikothek-Verl.

Style de citation Chicago

Bulka, Heinz Dieter. Facts About Germany: The Federal Republic of Germany. Gütersloh: Bertelsmann, Lexikothek-Verl, 1984.

Style de citation MLA

Bulka, Heinz Dieter. Facts About Germany: The Federal Republic of Germany. Bertelsmann, Lexikothek-Verl, 1984.