Cita APA (7th ed.)
Butscher, S. A. (2002). Customer loyalty programmes and clubs (2nd ed.). Gower.
Cita Chicago (17th ed.)
Butscher, Stephan A. Customer Loyalty Programmes and Clubs. 2nd ed. Aldershot, England ; Burlington, VT: Gower, 2002.
Cita MLA (9th ed.)
Butscher, Stephan A. Customer Loyalty Programmes and Clubs. 2nd ed. Gower, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.