APA (7th ed.) Citation

Marshall, A. (2012). Upsidonia. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marshall, Archibald. Upsidonia. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Marshall, Archibald. Upsidonia. Project Gutenberg, 2012.

Warning: These citations may not always be 100% accurate.