6Raeder S., Witterkind A., et al.Test- ing a psychological contract measure in a Swiss employment context [J], Swiss Journal of Psychology, 2009, 68(4).
7David E, Neil Conway, Commu- nicating the psychological contract: An em- ployer perspective [J], Human Kesource Management Journal; 2002; 12, 2.
8Steven N.S.Cheung.The Contractual Nature of the Firm[J].Journal of Law and Economics,1983,26 (1):1-21.
9Rousseau D.M.Psychological and implied contracts in organizations[J].Employee Responsibilities and Rights Journal,1989,(2):121-139.
10Robinson S.L,Kraatz M.S,Rousseau D.M.Changing obligations and the psychological contact:A longitudinal Study[J].Academy of management journal,1994,37:137-152.