1. Anderson, E. & Weitz, B. (1992). "The use of pledges to build and sustain commitment in distribution channels". Journal of Marketing research, 29(1), 18-34. https://doi.org/10.1177/002224379202900103
2. Auapinyakul, W. & Deebhijarn, S. (2019). "A structural equation modelling on factors related to the brand loyalty of diners to certified Thai restaurants in the United States". Asia-Pacific Social Science Review, 19(2), 155-163.
3. Berry, L.L. (1983). "Relationship marketing". In Berry, L.L., Shostack, G.L. & Upah, G. (Eds.): Emerging Perspectives on Services Marketing (pp. 25-28). Chicago, Il. (USA): American Marketing Association.
4. Bordonaba, M.V. & Garrido, A. (2001). "Marketing de relaciones: ¿Un nuevo paradigma?" Proyecto social: Revista de relaciones laborales, 9, 25-44.
5. Bowden-Everson, J.L-H., Dagger, T.S. & Elliot, G. (2013). "Engaging customers for loyalty in the restaurant industry: The role of satisfaction, trust and delight". Journal of Foodservice Business Research, 16(1), 52-75. https://doi.org/10.1080/15378020.2013.761025