Gross, S. J. (2004). Promises kept: Sustaining school and district leadership in a turbulent era. Association for Supervision and Curriculum Development.
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Dyfyniad Arddull Chicago
Gross, Steven J. Promises Kept: Sustaining School and District Leadership in a Turbulent Era. Alexandria, Va.: Association for Supervision and Curriculum Development, 2004.
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Dyfyniad MLA
Gross, Steven J. Promises Kept: Sustaining School and District Leadership in a Turbulent Era. Association for Supervision and Curriculum Development, 2004.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.