Certo, S. C. (2000). Supervision: Concepts and skill building (3rd ed.). Irwin/McGraw-Hill.
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Dyfyniad Arddull Chicago
Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Boston: Irwin/McGraw-Hill, 2000.
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Dyfyniad MLA
Certo, Samuel C. Supervision: Concepts and Skill Building. 3rd ed. Irwin/McGraw-Hill, 2000.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.