5
https://newsroom.accenture.com/news/members-of-customer-loyalty-programs-generate-significantly-more-revenue-for-retailers-than-do-non-members-accenture-research-finds.htm (https://newsroom.accenture.com/news/members-of-customer-loyalty-programs-generate-significantly-more-revenue-for-retailers-than-do-non-members-accenture-research-finds.htm)
6
http://currents.rosetta.com/2015/03/why-engaged-customers-are-your-best-customers-facts-figures-on-the-value-of-engagement/ (http://currents.rosetta.com/2015/03/why-engaged-customers-are-your-best-customers-facts-figures-on-the-value-of-engagement/)
7
https://kitewheel.com/press-releases/new-independent-study-reveals-major-disconnect-brands-todays-connected-consumers/ (https://kitewheel.com/press-releases/new-independent-study-reveals-major-disconnect-brands-todays-connected-consumers/)
8
https://www.the-cma.org/Contents/Item/Display/327325 (https://www.the-cma.org/Contents/Item/Display/327325)
9
https://www.rbc.ru/business/14/02/2017/589d97a49a7947e189fe2459 (https://www.rbc.ru/business/14/02/2017/589d97a49a7947e189fe2459)
10
https://romir.ru/press/rambler-eksperty-rasskazali-ob-otnoshenii-rossiyan-k-kartam-loyalnosti (https://romir.ru/press/rambler-eksperty-rasskazali-ob-otnoshenii-rossiyan-k-kartam-loyalnosti)
11
https://romir.ru/press/rambler-eksperty-rasskazali-ob-otnoshenii-rossiyan-k-kartam-loyalnosti (https://romir.ru/press/rambler-eksperty-rasskazali-ob-otnoshenii-rossiyan-k-kartam-loyalnosti)
12
Годин Сет. Фиолетовая корова. М.: МИФ, 2018. 176 с.
13
Permission marketing: turning strangers into friends, and friends into customers / Seth Godin. New York: Simon & Schuster, 1999.
14
https://www.visioncritical.com/blog/keep-customers-happy-infographic (https://www.visioncritical.com/blog/keep-customers-happy-infographic)
