Riddle, D. I., & Sutcliffe, L. G. (1997). Successful services exporting: A handbook for firms, associations and governments. ITC.
Cita Chicago (17th ed.)Riddle, Dorothy I., i Leni G. Sutcliffe. Successful Services Exporting: A Handbook for Firms, Associations and Governments. Geneva: ITC, 1997.
Cita MLA (9th ed.)Riddle, Dorothy I., i Leni G. Sutcliffe. Successful Services Exporting: A Handbook for Firms, Associations and Governments. ITC, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.