Lambert, C. (1988). The business presentations workbook. Prentice Hall.
Cita Chicago (17th ed.)Lambert, Clark. The Business Presentations Workbook. Englewood Cliffs, N.J.: Prentice Hall, 1988.
Cita MLA (9th ed.)Lambert, Clark. The Business Presentations Workbook. Prentice Hall, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.