Tohutoro APA (7th ed.)
Costello, S. J. (1994). Effective performance management. Jack Wilson and Associates.
Tohutoru Kātū Chicago (17th ed.)
Costello, Sheila J. Effective Performance Management. Illonois, Chicago: Jack Wilson and Associates, 1994.
Tohutoro MLA (9th ed.)
Costello, Sheila J. Effective Performance Management. Jack Wilson and Associates, 1994.
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