Praagh, V. G., & Van Praagh, G. (1967). The discovery of the electric current. Published for the Nuffield Foundation by the Longmans/Penguin Books.
Chicago-referens (17:e uppl.)Praagh, Van G., och Gordon Van Praagh. The Discovery of the Electric Current. London: Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
MLA-referens (9:e uppl.)Praagh, Van G., och Gordon Van Praagh. The Discovery of the Electric Current. Published for the Nuffield Foundation by the Longmans/Penguin Books, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.