MLA

Ryder, A. J. Twentieth-century Germany: From Bismarck to Brandt. London, 1973.

APA

Ryder, A. J. (1973). Twentieth-century Germany: from Bismarck to Brandt. London.

Chicago

Ryder, A. J. Twentieth-Century Germany: From Bismarck to Brandt. London, 1973.