Burroughs, E. R. (2010). Warlord of mars. Project Gutenberg.
Cita Chicago Style (17a ed.)Burroughs, Edgar Rice. Warlord of Mars. To be supplied: Project Gutenberg, 2010.
Cita MLA (8a ed.)Burroughs, Edgar Rice. Warlord of Mars. Project Gutenberg, 2010.
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