Nelson, C. A. (2009). Import/export: How to take your business across borders (4th ed.). McGraw Hill.
Cita Chicago (17th ed.)Nelson, Carl A. Import/export: How to Take Your Business Across Borders. 4th ed. New York: McGraw Hill, 2009.
Cita MLA (9th ed.)Nelson, Carl A. Import/export: How to Take Your Business Across Borders. 4th ed. McGraw Hill, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.