APA (7th ed.) Citation

Glasgow, E. A. G. (2010). Phases of an Inferior Planet. Project Gutenberg.

Chicago Style (17th ed.) Citation

Glasgow, Ellen Anderson Gholson. Phases of an Inferior Planet. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Glasgow, Ellen Anderson Gholson. Phases of an Inferior Planet. Project Gutenberg, 2010.

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