DIGBY, M. (1960). The World Co-operative Movement Margaret Digby. Hutchinson University Library.
Lua i Stíl Chicago (17ú heag.)DIGBY, Margaret. The World Co-operative Movement Margaret Digby. Hutchinson University Library, 1960.
Lua MLA (8ú heag.)DIGBY, Margaret. The World Co-operative Movement Margaret Digby. Hutchinson University Library, 1960.
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