Albert Karl, & J. Bradford Lawrence. (1990). The Service Advantage: How to Identify and Fulfill Customer Needs (In lần thứ 1.). U.S.A: Dow Jones - Irwin.
Styl cytowania ChicagoAlbert Karl, i J. Bradford Lawrence. The Service Advantage: How to Identify and Fulfill Customer Needs. In lần thứ 1. U.S.A: Dow Jones - Irwin, 1990.
Styl cytowania MLAAlbert Karl, i J. Bradford Lawrence. The Service Advantage: How to Identify and Fulfill Customer Needs. In lần thứ 1. U.S.A: Dow Jones - Irwin, 1990.
Uwaga: Te cytaty mogą odróżniać się od wytycznej twojego fakultetu..