Verne, J. (2010). A journey to the centre of the earth. Project Gutenberg.
Cita Chicago Style (17a ed.)Verne, Jules. A Journey to the Centre of the Earth. To be supplied: Project Gutenberg, 2010.
Cita MLA (8a ed.)Verne, Jules. A Journey to the Centre of the Earth. Project Gutenberg, 2010.
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