Druker, A. S. (1951). Henry Sewell and the establishment of responsible government in New Zealand.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDruker, Ashe Stephen. Henry Sewell and the Establishment of Responsible Government in New Zealand. 1951.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDruker, Ashe Stephen. Henry Sewell and the Establishment of Responsible Government in New Zealand. 1951.
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