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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Graham, James, και 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.
Παραπομπή σε μορφή MLA (8th εκδ.)Graham, James, και 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.