Smith, J. (2000). Successful customer retention in a week. Hodder & Stoughton.
Cita Chicago (17th ed.)Smith, Jane. Successful Customer Retention in a Week. London: Hodder & Stoughton, 2000.
Cita MLA (8th ed.)Smith, Jane. Successful Customer Retention in a Week. Hodder & Stoughton, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.