Eyck, E. (1943). Bismarck. Rentsch.
Cita Chicago (17th ed.)Eyck, Erich. Bismarck. Erlenbach-Zürich: Rentsch, 1943.
Cita MLA (8th ed.)Eyck, Erich. Bismarck. Rentsch, 1943.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)