Tullis G. Graham & Power S. Susan. (2004). New Insights into Business: Workbook CD. Harlow, Longman, 2004.
Cita Chicago (17th ed.)Tullis G. Graham i Power S. Susan. New Insights into Business: Workbook CD. Harlow, Longman, 2004, 2004.
Cita MLA (9th ed.)Tullis G. Graham i Power S. Susan. New Insights into Business: Workbook CD. Harlow, Longman, 2004, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.