Não informado. (1965). Government and Opposition. London School of Economics and Political Science.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Government and Opposition. London: London School of Economics and Political Science, 1965.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Government and Opposition. London School of Economics and Political Science, 1965.
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