Puswiartika, D., Z. Rusyda Hinduan, M. Sulastiana, and D. Harding. “Dispositional Mindfulness: Its Impact on Customer Oriented Organizational Citizenship Behavior and Mediating Role of Servant Leadership”. Opción, Vol. 35, Aug. 2019, pp. 1066-8, http://www.produccioncientifica.luz.edu.ve/index.php/opcion/article/view/32282.