Incomes Data Services. (1991). Terms and conditons of employmnet: Incomes Data Services. Institute of Personnel Management.
Chicago-viite (17. p.)Incomes Data Services. Terms and Conditons of Employmnet: Incomes Data Services. London: Institute of Personnel Management, 1991.
MLA-viite (9. p.)Incomes Data Services. Terms and Conditons of Employmnet: Incomes Data Services. Institute of Personnel Management, 1991.
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