Tucker, R. (2000). Customer service for the new millennium. East west Books.
Cita Chicago (17th ed.)Tucker, Robert. Customer Service for the New Millennium. Chennai: East west Books, 2000.
Cita MLA (9th ed.)Tucker, Robert. Customer Service for the New Millennium. East west Books, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.