Perkins, C. E. (1965). What every supervisor should know about hotel/motel safety. Cornell University.
Chicago-viite (17. p.)Perkins, Charles E. What Every Supervisor Should Know About Hotel/motel Safety. Ithaca, N. Y: Cornell University, 1965.
MLA-viite (9. p.)Perkins, Charles E. What Every Supervisor Should Know About Hotel/motel Safety. Cornell University, 1965.
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