Li, Yi-Min. “A Study on the Correlations Among Psychological Contract, Organizational Citizenship Behavior, and Performance in the Hotel Industry”. Revista de Cercetare Si Interventie Sociala, vol. 47, Dec. 2014, pp. 250-6, https://www.rcis.ro/journal/article/view/2105-a-study-on-the-correlations-among-psychological-contract.