Sobel, D. (1996). Longitude: The true story of a lone genius who solved the greatest scientific problem of his time. Fourth Estate.
Chicago-referens (17:e uppl.)Sobel, Dava. Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time. London: Fourth Estate, 1996.
MLA-referens (9:e uppl.)Sobel, Dava. Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time. Fourth Estate, 1996.
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