Praagh, V. G., & Van Praagh, G. (1967). The discovery of the electric current. Published for the Nuffield Foundation by the Longmans/Penguin Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPraagh, Van G., और Gordon Van Praagh. The Discovery of the Electric Current. London: Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPraagh, Van G., और Gordon Van Praagh. The Discovery of the Electric Current. Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
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