Sayre, F. B. (1940). The protection of American export trade: Being the course of lectures delivered at Westminster College, Fulton, Missouri, 1939. University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSayre, Francis Bowes. The Protection of American Export Trade: Being the Course of Lectures Delivered at Westminster College, Fulton, Missouri, 1939. Chicago, Ill: University of Chicago Press, 1940.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSayre, Francis Bowes. The Protection of American Export Trade: Being the Course of Lectures Delivered at Westminster College, Fulton, Missouri, 1939. University of Chicago Press, 1940.
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