Principles and problems of cooperative. [s.n.].
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Dyfyniad Arddull Chicago
Principles and Problems of Cooperative. [S.l.]: [s.n.].
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Dyfyniad MLA
Principles and Problems of Cooperative. [s.n.].
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.