Schaller, L. E. (1972). The change agent. Abingdon Press.
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Dyfyniad Arddull Chicago
Schaller, Lyle E. The Change Agent. Nashville: Abingdon Press, 1972.
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Dyfyniad MLA
Schaller, Lyle E. The Change Agent. Abingdon Press, 1972.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.