1. Abou-Shouk, Mohamed A. y Hewedi, Mahamoud M. (2016). Antecedents and Consequences of Social Media Adoption in Travel and Tourism: Evidence from Customers and Industry. International Journal of Social, Behavioral, Educational, Economic, Business and Industrial Engineering, 10(2), 652-659. https://doi.org/10.5281/zenodo.1112246
2. Agapitou, Chyrsa, Bersimis, Sotirios y Georgakellos, Dimitrios (2017). Appraisal of CRM implementation as business strategy option in times of recession: The role of perceived value and benefits. International Journal of Business Science & Applied Management (IJBSAM), 12(2), 18-31. https://www.business-and-management.org/paper.php?id=126
3. Agariya, Arun Kumar y Singh, Deepali (2011). What really defines relationship marketing? A review of definitions and general and sector-specific defining constructs. Journal of Relationship Marketing, 10(4), 203-237. https://doi.org/10.1080/15332667.2011.624905
4. Aka, Deborah; Kehinde, Oladele y Ogunnaike, Olaleke (2016). Relationship marketing and customer satisfaction: A conceptual perspective. Binus Business Review, 7(2), 185-190. https://doi.org/10.21512/bbr.v7i2.1502
5. Alcaide Casado, Juan Carlos (2015). Fidelización de clientes. Madrid: ESIC editorial.