Koch, H. (1984). Constitutional history of Germany in the nineteenth and twentieth centuries. Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKoch, H.W. Constitutional History of Germany in the Nineteenth and Twentieth Centuries. Longman, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKoch, H.W. Constitutional History of Germany in the Nineteenth and Twentieth Centuries. Longman, 1984.
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