Cita APA (7a ed.)

Helgesen, O. (2006). Are loyal customers profitable?: Customer satisfaction, customer (action) loyalty and customer profitability at the individual level. [s.n.].

Cita Chicago Style (17a ed.)

Helgesen, Oyvind. Are Loyal Customers Profitable?: Customer Satisfaction, Customer (action) Loyalty and Customer Profitability at the Individual Level. [S.l.]: [s.n.], 2006.

Cita MLA (9a ed.)

Helgesen, Oyvind. Are Loyal Customers Profitable?: Customer Satisfaction, Customer (action) Loyalty and Customer Profitability at the Individual Level. [s.n.], 2006.