Graham, J., & Oliver, G. A. S. (1904). German commercial practice connected with the export and import trade to and from Germany: The German colonies, and the countries where German is the recognised language of commerce. Macmillan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGraham, James, और George A. S. Oliver. German Commercial Practice Connected with the Export and Import Trade to and from Germany: The German Colonies, and the Countries Where German Is the Recognised Language of Commerce. London, New York: Macmillan, 1904.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGraham, James, और George A. S. Oliver. German Commercial Practice Connected with the Export and Import Trade to and from Germany: The German Colonies, and the Countries Where German Is the Recognised Language of Commerce. Macmillan, 1904.