Köcher, S. (2015). The Paradox of Points: Theoretical Foundation and Empirical Evidence of Medium Magnitude Effects in Loyalty Programs. Springer.
استشهاد بنمط شيكاغوKöcher, Sören. The Paradox of Points: Theoretical Foundation and Empirical Evidence of Medium Magnitude Effects in Loyalty Programs. Springer, 2015.
MLA استشهادKöcher, Sören. The Paradox of Points: Theoretical Foundation and Empirical Evidence of Medium Magnitude Effects in Loyalty Programs. Springer, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.