Whitaker, D. S. (2001). Using groups to help people (2nd ed.). Routledge.
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Dyfyniad Arddull Chicago
Whitaker, Dorothy Stock. Using Groups to Help People. 2nd ed. Hove: Routledge, 2001.
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Dyfyniad MLA
Whitaker, Dorothy Stock. Using Groups to Help People. 2nd ed. Routledge, 2001.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.