Hill, N., & Alexander, J. (2006). Handbook of customer satisfaction and loyalty measurement (Third edition.). Gower Publishing Limited.
Lua i Stíl Chicago (17ú heag.)Hill, Nigel, agus Jim Alexander. Handbook of Customer Satisfaction and Loyalty Measurement. Third edition. Aldershot, Hampshire, England: Gower Publishing Limited, 2006.
Lua MLA (9ú heag.)Hill, Nigel, agus Jim Alexander. Handbook of Customer Satisfaction and Loyalty Measurement. Third edition. Gower Publishing Limited, 2006.
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