(2015). Performance Management for Secondary Education Headmasters from Viewpoint their Assistant. , 1(215), 379-390.
. "Performance Management for Secondary Education Headmasters from Viewpoint their Assistant". , 1, 215, 2015, 379-390.
(2015). 'Performance Management for Secondary Education Headmasters from Viewpoint their Assistant', , 1(215), pp. 379-390.
Performance Management for Secondary Education Headmasters from Viewpoint their Assistant. , 2015; 1(215): 379-390.


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